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marchand5892

How does the normal heart work? - 0 views

www.heartfailurematters.org/...How-does-the-normal-heart-work

Normal Heart

shared by marchand5892 on 31 Oct 14 - No Cached
  • Your heart is a specialised muscle that pumps blood around your body. Blood carries oxygen and nourishment to all parts of your body and carries waste products to several organs, notably your lungs and kidneys to eliminate. Your heart is divided into two pumps which work together. Blood coming back from the organs and tissues of your body enters the right side of your heart which then pumps it to your lungs. Your lungs remove waste carbon dioxide from the blood and recharge it with oxygen. The oxygen-rich blood returning from your lungs enters the left side of your heart, which then pumps it to all parts of your body, including your heart muscle itself. This process ensures that there is always enough oxygen and nourishment for your body to work efficiently.
  • t is a specialised muscle that pumps blood around your body. Blood carries oxygen and nourishment to all parts of your body and carries waste products to seve
  • Your heart is a specialised muscle that pumps blood around your body. Blood carries oxygen and nourishment to all parts of your body and carries waste products to several organs, notably your lungs and kidneys to eliminate.
  • ...1 more annotation...
    • marchand5892
      marchand5892 on 04 Nov 14
       
      Everyone's heart is a special muscle, that "pumps around your body" and pumps blood out." The blood gets pushed and picks up the oxygen and the the blood travels through your body and drops the oxygen for the heart to circulate  
deleon6878

BrainPOP | Gills - 0 views

www.brainpop.com/...gills

brainpop fish gills

shared by deleon6878 on 04 Nov 14 - No Cached
    • deleon6878
      deleon6878 on 04 Nov 14
       
      Inside the fish theres something called the lamellae (The lamellae is an organ that the fish has to help it breathe.) and theres tiny blood cells and theres a blood vessel that bring the blood really close to the surface. When water goes into the gills,oxygen goes to the fish. When blood carries oxygen to the lamellae it doesn't have a lot of oxygen. Blood swims through the blood vessels and water swims the opposite way to the lamellae. That way, blood swims through the gills but it was a little less oxygen than the water around it. When the blood can't hold any more oxygen it swims its way to the heart.  
    • deleon6878
      deleon6878 on 10 Nov 14
       
      To get oxygen the fish just moves with their mouth open or take a gulp of water  
    • deleon6878
      deleon6878 on 10 Nov 14
       
      The bigger the lamellae is the better blood can hit contact with water and the fish can get more oxygen
    • deleon6878
      deleon6878 on 10 Nov 14
       
      The lamellae has evolved so much to have the most surface area it can have 
marchand5892

Blood Flow - HowStuffWorks - 0 views

health.howstuffworks.com/...heart3.htm

howstuffworks

shared by marchand5892 on 31 Oct 14 - No Cached
  • All blood enters the right side of the heart through two veins: The superior vena cava (SVC) and the inferior vena cava (IVC) (see figure 3).The SVC collects blood from the upper half of the body. The IVC collects blood from the lower half of the body. Blood leaves the SVC and the IVC and enters the right atrium (RA) (3).When the RA contracts, the blood goes through the tricuspid valve (4) and into the right ventricle (RV) (5). When the RV contracts, blood is pumped through the pulmonary valve (6), into the pulmonary artery (PA) (7) and into the lungs where it picks up oxygen.
marchand5892

What Is a Vein? Definition, Types and Illustration - 0 views

biology.about.com/...vein.htm

shared by marchand5892 on 10 Nov 14 - No Cached
    • marchand5892
      marchand5892 on 10 Nov 14
       
      A Vein is like a blue tube that is inside your body to help the blood flow calmly and fast because if there weren't veins, could mess up all and it wouldn't get to your heart neither your brain so you could die, so as there is veins, blood can pass to the heart and to the brain
Nany Rocha

BBC - Future - Does sugar make children hyperactive? - 0 views

www.bbc.com/...es-sugar-make-kids-hyperactive

future sugar children bbc

shared by Nany Rocha on 03 Dec 14 - No Cached
  • The idea that sugar affects behaviour is widely believed and there are various hypotheses that attempt to explain how, including some children might have an allergic response to refined sugar, or have abnormal patterns of blood glucose levels.
    • Nany Rocha
      Nany Rocha on 03 Dec 14
       
      There are lots of hypothesis's that explain how some children might have a allergic reaction to sugar and thats why they get "hyper", orthey have abnormal patterns of blood glucose levels.(diabetes)
    • Nany Rocha
      Nany Rocha on 03 Dec 14
       
      Sugar can be called beer for some adults because sugar gives the same effect to children that eat or drink a lot of sugar as adults can get the effect from drinking a lot of beer.so in conclusion you could get "drunk" for eating or drinking  lot of sugar because when you eat or drink a lot of sugar you get a tummy ache which then a sugar-rush follows causing you to get "drunk"
Isabel Herrera

Yale Scientific Magazine - Does Sugar Really Make Children Hyper? - 0 views

www.yalescientific.org/...gar-really-make-children-hyper

sugar

shared by Isabel Herrera on 03 Dec 14 - No Cached
  • Years of oral tradition say yes, but modern science disagrees.
    • Isabel Herrera
      Isabel Herrera on 03 Dec 14
       
      Parents around the world often say that sugar really causes kids to get hyper but real studies from scientists actually proves that it doesn't. 
  • Science first became interested in the link between sugar and hyperactivity when the Feingold Diet became popular in 1973. Devised by allergist Dr. Benjamin Feingold, it advocated the removal of food additives, such as dyes and artificial flavors, from children’s diets because they might lead to hyperactivity. Although this special diet did not originally mention sugar, sugar became grouped under the category of food additives due to the common belief that it affected behavior.
    • Isabel Herrera
      Isabel Herrera on 03 Dec 14
       
      Scientists became interested in sugar and how it affects kids just when the diet turned popular in 1973. Allergist Dr Benjamin Feingold has been deciding to do the "removal" of food with color dye and artificial flavors from kids diets because they might get to the point of hyperactivity.
  • Through various experiments over the years, scientists have discovered that no substantial evidence exists to support the claim that sugar causes hyperactivity.
    • Isabel Herrera
      Isabel Herrera on 03 Dec 14
       
      Even though scientists say that sugar does not cause hyperactivity, they still have no evidence for that.
  • ...2 more annotations...
  • Nonetheless, other experiments show that sugar may at least influence behavior.
    • Isabel Herrera
      Isabel Herrera on 03 Dec 14
       
      But others studies show that sugar might not affect hyper kids, but it may affect behavior 
  • Dr. Wesnes conducted a study in which he found that having a large amount of sugar for breakfast led to a severe deterioration of attention span when compared to having no breakfast or eating whole grain cereal. Dr. Tamborlane, also from Yale, reported that children given sugar had higher levels of adrenaline. A possible explanation for this effect is that since sugar is quickly absorbed into the bloodstream, blood sugar rises quickly, which can lead to higher adrenaline levels and thus symptoms similar to those associated with hyperactivity. Furthermore, children with ADHD also tend to have higher levels of insulin.
    • Isabel Herrera
      Isabel Herrera on 04 Dec 14
       
      Dr Wesnes found that if a kid has a huge pile of sugar for breakfast it can cause them to not pay attention at anything. But if you have a whole grain breakfast you can be more concentrate more. Also Dr Tamborlane says that kids that eat alot of sugar have "higher levels of adrenaline. Another way to say this is that if you eat a lot of sugar all the sugar is absorbed to the "bloodstream" and blood sugar goes up quickly, that"s why kids can have higher levels of "adrenaline."
Regina Cantu

Why do we get sick? - HowStuffWorks - 2 views

science.howstuffworks.com/...get-sick.htm

Sick Health

shared by Regina Cantu on 31 Oct 14 - No Cached
  • As an example, think of a person who has a cold. That person may cough into his or her hand and then touch a doorknob, thus placing the cold virus on that doorknob. The virus may die on the doorknob, but it's also possible that the next person to touch the doorknob will pick it up. If that person then touches food with the unwashed hand and consumes the food, the virus is now inside the body.
  • The earliest physicians thought that illness and disease were a sign of God's anger or the work of evil spirits. Hippocrates and Galen advanced the concept of humorism, a theory which held that we get sick from imbalances of the four basic substances within the human body, which they identified as blood, phlegm, black bile and yellow bile. Paracelsus, a Renaissance-era physician, was one of the first to posit that sickness comes from outside sources, rather than from within.Today, we know that there are two major kinds of diseases: infectious and non-infectious.
    • Regina Cantu
      Regina Cantu on 04 Nov 14
       
      For example, if a person has gotten a cold and sneezes into their hand, then suddenly they touch the light switch, They leave the cold there, it may also be that the cold virus dies there, but it may also be that the next person who touches the light switch gets it in their hands. If they go to eat, and they don't wash their hands and they touch what they are going to eat they get it in their mouth and now they have the cold.
garza6544

How Do Broken Bones Heal? - Health News and Views - Health.com - 0 views

news.health.com/...how-do-broken-bones-heal

bones health

shared by garza6544 on 31 Oct 14 - No Cached
  • Bones are flexible enough to give a bit when physical force is applied, but if that force is too great, they’ll snap like a plastic ruler bent too far. Luckily, they also repair themselves naturally (even better with a cast). Here’s how bones heal. 1. Immediately after a fracture occurs, a blood clot and callus form around it. 2. New “threads” of bone cells start to grow on both sides of the fracture line toward one another. 3. Eventually, the fracture closes up and the callus is absorbed by the new cells. This process may take from six weeks to a year.
garzat5774

BrainPOP | Hair - 1 views

www.brainpop.com/...hair

brainpop hair

shared by garzat5774 on 05 Nov 14 - No Cached
    • garzat5774
      garzat5774 on 05 Nov 14
       
      All mammals have hair in there body because they need to keep themselves warm when it's cold, we are warm blooded as the rest of the mammals. all mammels have hair exept the water mammels like whales and dolphins but they keep warm there bodies by eatins a lot of amilals and get layers of fat that will keep them warm, but etherway they have at least a little bit of hair one point during there lives. 
    • garzat5774
      garzat5774 on 05 Nov 14
       
      Hummans have hair in almost every part of our body, some places that don't include our lips, the palms of your hand and the souls of your feet. But our hair is different in each part of your body. One type of hair is the lauguno hair, wish is the hair babies are covered with.Another type of hair is the vellus hair wish is the hair moat of your body is covered with, those hair is the one in your legs and arms and mesures less than 1 inch,And the 3rd type is the terminal hair wish is longer than an inch and grows in the top of your head and other places.
    • garzat5774
      garzat5774 on 05 Nov 14
       
      how doe your hair grow? first before you are born tiny foccils are formed inside your skin, foccils are like roots but for hair. you have a ton of focills you have 100,000 yust in your head alone. AT the bottom of each foccils you have thousands of cells with are dividing each second , as they divide and are craetedb the old ones are pushed out and out of you head this makes hair
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    • garzat5774
      garzat5774 on 05 Nov 14
       
      each hair has 2 or 3 diffrent types of layers the outermost layer is called the cuticle wich protects the rest of the hair. the middle hair is called the cortex, and the center of the hair is caled meddul, you only have medulla in your terminal hair and if you are a natural blande you dont have any meddula at all.
lobo5879

Five Stages Of Sleep ... Sleep Cycles Explained - 2 views

www.better-sleep-better-life.com/five-stages-of-sleep.html

stages sleep

shared by lobo5879 on 03 Nov 14 - No Cached
  • Stage 1This is the lightest stage of sleep, the transition phase, where you feel yourself drifting off. If you were to forget about the alarm clock and allow yourself to wake up naturally, Stage 1 sleep would be the last stage before you fully wake up. You don't spend too much time in Stage 1 sleep, typically five to 10 minutes, just enough to allow your body to slow down and your muscles to relax.
    • lobo5879
      lobo5879 on 04 Nov 14
       
      The stage 1 of sleep is when you are starting to relax your muscles and start to sleep. This stages is not very long it is about 5 to ten minutes. This stage is when you wake up more quickly for example if someone touches you you will easily wake up.
  • Stage 2The second stage of sleep is still considered light sleep. Your brain activity starts to slow down, as well as your heart rate and breathing. Your body temperature falls a little and you're beginning to reach a state of total relaxation in preparation for the deeper sleep to come.
  • Stage 3Stage 3 sleep is the start of deep sleep, also known as slow wave sleep. During stage 3, your brain waves are slow "delta waves," although there may still be short bursts of faster of brain activity (also known as beta-waves). If you were to get awakened suddenly during this stage, you would be groggy and confused, and find it difficult to focus at first.
    • lobo5879
      lobo5879 on 04 Nov 14
       
      this stage is when your body is finishing to relax and example is: if someone trys to wake you up you would be confused and do not know what is happening because you were already finishing to completely relax
  • ...3 more annotations...
  • Stage 4Of the five stages of sleep, this is the one when you experience your deepest sleep of the night. Your brain only shows delta-wave (slow wave) activity, and it's difficult to wake someone up when they're in Stage 4 of sleep.
    • lobo5879
      lobo5879 on 04 Nov 14
       
      this stage i when you are more hardly to be awaken. In this stage is when you start to dream and this stage is when the kids start having nightmares
  • It's during Stage 4 sleep that children are most likely to suffer from bedwetting or sleep terrors. Stages 3 and 4 can last anywhere from 5 - 15 minutes each, but the first deep sleep of the night is more likely to be an hour or so. This is the time when the body does most of it's repair work and regeneration.
  • Stage 5 This is the stage of sleep when you dream. It is also referred to as "active sleep" or REM sleep, which stands for the rapid eye movements that characterize Stage 5. During REM sleep, your blood flow, breathing, and brain activity increases. An EEG would show that your brain is about as active as it is when you're awake.Another aspect of Stage 5 sleep is that the muscles in your arms and legs will go through periods of paralysis. Scientists speculate that this may be nature's way of protecting us from acting out our dreams.The first period of REM sleep of the night usually begins about 90 minutes after you start drifting off, and lasts for about 10 minutes. As the night passes, the periods of REM sleep become longer, with the final episode lasting an hour or so.Babies may spend as much as half of the time they're asleep in the REM phase. For a healthy adult, Stage 5 occurs for about 20 to 25% of the time you are sleeping, and decreases with age.Scientists and researchers are continually learning more about the mechanics and physiological effects of sleep, and what happens during the five stages of sleep.
    • lobo5879
      lobo5879 on 04 Nov 14
       
      This stage is when you are completly relaxed and many babies are many time during this tage and adults are abaut 25% of they sleep
    • lobo5879
      lobo5879 on 06 Nov 14
       
      This stage is more dificult to wake up because you are alrady in deep sleep.
guzman5862

The Healing Properties of Tears: 7 Good Reasons to Cry Your Eyes Out - Beyond Blue - 0 views

www.beliefnet.com/...ays-tears-and-crying-heal.html

cry eyes reasons works facts

shared by guzman5862 on 10 Nov 14 - No Cached
  • 1. Tears help us see. Starting with the most basic function of tears, they enable us to see. Literally. Tears not only lubricate our eyeballs and eyelids, they also prevent dehydration of our various mucous membranes. No lubrication, no eyesight. Writes Bergman: “Without tears, life would be drastically different for humans–in the short run enormously uncomfortable, and in the long run eyesight would be blocked out altogether.”
  • 2. Tears kill bacteria. No need for Clorox wipes. We’ve got tears! Our own antibacterial and antiviral agent working for us, fighting off all the germs we pick up on community computers, shopping carts, public sinks, and all those places the nasty little guys make their homes and procreate. Tears contain lysozyme, a fluid that the germ-a-phobic dreams about in her sleep, because it can kill 90 to 95 percent of all bacteria in just five to 10 minutes! Which translates, I’m guessing, to three months’ worth of colds and stomach viruses.
  • 3. Tears remove toxins. Biochemist William Frey, who has been researching tears for as long as I’ve been searching for sanity, found in one
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  • study that emotional tears–those formed in distress or grief–contained more toxic byproducts than tears of irritation (think onion peeling). Are tears toxic then? No! They actually remove toxins from our body that build up courtesy of stress. They are like a natural therapy or massage session, but they cost a lot less!
  • 4. Crying can elevate mood. Do you know what your manganese level is? No, neither do I. But chances are that you will feel better if it’s lower because overexposure to manganese can cause bad stuff: anxiety, nervousness, irritability, fatigue, aggression, emotional disturbance and the rest of the feelings that live inside my happy head rent-free. The act of crying can lower a person’s manganese level. And just like with the toxins I mentioned in my last point, emotional tears contain 24 percent higher albumin protein concentration–responsible for transporting many small molecules (which has to be a good thing, right?)–than irritation tears.
  • 5. Crying lowers stress. Tears really are like perspiration in that exercising and crying both relieve stress. For real. In his article, Bergman explains that tears remove some of the chemicals built up in the body from stress, like the endorphin leucine-enkaphalin and prolactin, the hormone I overproduce because of my pituitary tumor that affects my mood and stress tolerance. The opposite is true too. Bergman writes, “Suppressing tears increases stress levels, and contributes to diseases aggravated by stress, such as high blood pressure, heart problems, and peptic ulcers.
  • 6. Tears build community. In her “Science Digest” article, writer Ashley Montagu argued that crying not only contributes to good health, but it also builds community. I know what you’re thinking: “Well, yeah, but not the right kind of community. I mean, I might ask the woman bawling her eyes out behind me in church what’s wrong or if I can help her, but I’m certainly not going to invite her to dinner.” I beg to differ. As a prolific crier, especially on video, I always come away astounded by the comments … the resounding support of people I know all that well, and the level of intimacy exchanged among them. Read for yourselves some of the comments on both my self-esteem video and my recent death and dying video and you’ll appreciate my point. Tears help communication and foster community.
  • 7. Tears release feelings. Even if you haven’t just been through something traumatic or are severely depressed, the average Jo goes through his day accumulating conflicts and resentments. Sometimes they gather inside the limbic system of the brain and in certain corners of the heart. Crying is cathartic. It lets the devils out. Before they wreak all kind of havoc with the nervous and cardiovascular systems. Writes John Bradshaw in his bestseller “Home Coming”: “All these feelings need to be felt. We need to stomp and storm; to sob and cry; to perspire and tremble.” Amen, Brother Bradford!
garzat5774

How birds fly | Sciencelearn Hub - 0 views

sciencelearn.org.nz/...How-birds-fly

birds

shared by garzat5774 on 03 Dec 14 - No Cached
  • Birds have many physical features, besides wings, that work together to enable them to fly. They need lightweight, streamlined, rigid structures for flight. The four forces of flight – weight, lift, drag and thrust – affect the flight of birds.
  • Flying birds have: lightweight, smooth feathers – this reduces the forces of weight and drag a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust light bones – a bird’s bones are basically hollow with air sacs and thin, tiny cross pieces to make bones stronger – this reduces the force of weight a rigid skeleton to provide firm attachments for powerful flight muscles – this helps with the force of thrust a streamlined body – this helps reduce the force of drag wings – these enable the force of lift.
  • WingsThe shape of a bird’s wing is important for producing lift. The increased speed over a curved, larger wing area creates a longer path of air. This means the air is moving more quickly over the top surface of the wing, reducing air pressure on the top of the wing and creating lift. Also, the angle of the wing (tilted) deflects air downwards, causing a reaction force in the opposite direction and creating lift.Larger wings produce greater lift than smaller wings. So smaller-winged birds (and planes) need to fly faster to maintain the same lift as those with larger wings.Wing loading tells you how fast a bird or plane must fly to be able to maintain lift: wing loading = weight/wing area (kilograms per square metre).A smaller wing loading number means the bird/plane can fly more slowly while still maintaining lift and is more manoeuvrable.
  • ...7 more annotations...
  • GlidingWhen a bird is gliding, it doesn’t have to do any work. The wings are held out to the side of the body and do not flap. As the wings move through the air, they are held at a slight angle, which deflects the air downwards and causes a reaction in the opposite direction, which is lift. But there is also drag (air resistance) on the bird’s body, so every now and then, the bird has to tilt forward and go into a slight dive so that it can maintain forward speed.
  • SoaringSoaring flight is a special kind of glide in which the bird flies in a rising air current (called a thermal). Because the air is rising, the bird can maintain its height relative to the ground. The albatross uses this type of soaring to support its multi-year voyages at sea.
  • FlappingBirds’ wings flap with an up-and-down motion. This propels them forward. The entire wingspan has to be at the right angle of attack, which means the wings have to twist (and do so automatically) with each downward stroke to keep aligned with the direction of travel.
  • Birds obtain thrust by using their strong muscles and flapping their wings. Some birds may use gravity (for example, jumping from a tree) to give them forward thrust for flight. Others may use a running take-off from the ground.
  • Different birds have different adaptive features to meet their flight needs: Some birds are small and can manipulate their wings and tail to manoeuvre easily, such as the fantail (pīwakawaka). The hawk, with its large wingspan, is capable of speed and soaring. Gannets and seabirds are streamlined to dive at high speeds into the ocean for fish. Godwits, although small, are equipped to fly long distances.
    • garzat5774
      garzat5774 on 03 Dec 14
       
      birds have some chacteristics that help them fly, birds are light weighted they have light feathers insted of heavy ones that add more weight to their bodys, they also have a beak insted of jaws that also add weight to their boddys, thay have hollow bones in their body that means that the bone has nothing inside it
    • garzat5774
      garzat5774 on 03 Dec 14
       
      birds get ready to fly by flapping their wings, some birds use "gravity" to take of some run and they jump just like an airplane and others jump from a tree and then start flapping their winds
deleon6878

instaGrok - 0 views

www.instagrok.com/results.html

fish and other wacky stuff about their gills

shared by deleon6878 on 31 Oct 14 - No Cached
  • fish and gills
    • deleon6878
      deleon6878 on 07 Nov 14
       
      Blood moves to the gills and their surface and its lamellae. ("The lamellae is the most important part of the gills since this is where gas exchange actually takes place. Fish have 2 ways of getting their oxygen full "that is diffused by the gills  
jaime5789

"Missing Links" Found between Birds and Dinosaurs - Scientific American - 0 views

www.scientificamerican.com/...nd-between-birds-and-dinosaurs

shared by jaime5789 on 07 Nov 14 - No Cached
  • "Dinosaurs became ever more 'birdy' over time," Brusatte said, but there was no single missing link, he added. Birds and dinosaurs are like two colors in a rainbow, he said — you can recognize each, but they bleed into each other at their borders.
    • jaime5789
      jaime5789 on 07 Nov 14
       
      Scientists think that dinosaurs and birds were connected, not only because they look alike, but because their blood is identical... 
  • The new pedigree of carnivorous dinosaur evolution is the most comprehensive one ever assembled, the researchers say. The findings show that birdlike features such as wings and feathers developed slowly over tens of millions of years.
    • jaime5789
      jaime5789 on 07 Nov 14
       
      Dinosaurs evolved to birds, and it happened slowly, it took millions of years for dinosaurs to evolve into birds... Even though they were always changing, they grew feathers, then developed flying skills!
  • The label of "bird" is somewhat arbitrary, but scientists consider the feathered fossil Archaeopteryx to be the first of the group, Brusatte said. "What probably distinguishes birds is the ability to have powered flight," he said, though it's possible that other dinosaurs could fly too.
    • jaime5789
      jaime5789 on 07 Nov 14
       
      We predict that  Archaeopteryx a very early bird, that looks like a dinosaur, and lives with the dinosaurs is what made the birds of today fly! 
  • ...1 more annotation...
  • the earliest birds would have been indistinguishable from their closest relatives.
    • jaime5789
      jaime5789 on 07 Nov 14
       
      The earliest birds such as Archaeopteryx were really hard identify because they were so different compared to the birds we have today!
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