The most interesting part that I have learned in circulatory system is about our liver, because I never knew that liver is part of circulatory system.

2. Use play dough, clay, or silly putty to seal the hole inside the cup and around the straw so that water cannot leak out of the hole. Why do you not want water to leak out the holes? How might that change your experiment?
You don't want any water to leak out the holes because the blood only goes through blood vessel. Also if the water leak out the hole, the amount of water that's falling out will not be accurate.

4. Do you think the straws will have the same or different flow rates? Why?
Yes because the size of the straws are different.


7. Does water stop flowing out of the two cups at the same or different times? What does this tell you about the flow rate? Is the flow rate of a straw with a large diameter the same or different from the flow rate of a straw with a small diameter?
The water stops flowing out of the two cups at different times. This tells me about the flow rate that the bigger straw will release water much faster than the smaller one, because it has a bigger space for the water to flow through.

Artery
Carries oxygenated blood away from the hear (Large, Elastic, Medium or Muscular)

Capillaries
Connects Arteries to Vein
Remove cellular waste, including carbon dioxide.

Vein
Send blood back up towards the heart
It contains little oxygen

Heart rate = ANY heart beat
Pulse rate = ONLY heart beats which are strong enough to be felt way out at your wrist/knee/ankle, etc.

Respiration:
1. NOSE:
Before air enters the body, the nose filters it to remove dirt and warms up so that it's at an appropriate temperature.
2. PHARYNX:
The pharynx is a muscular tube that carries the air down into the trachea and also carries food to the gullet.
3. EPIGLOTTIS:
The epiglottis is a leaf-shaped piece of cartilage that covers the top of the larynx during swallowing. It keeps food out of the lungs and larynx.
4. LARYNX:
Larynx sits on the top of the trachea and has a backbone of cartilage that you can feel at the front of your throat.
5. VOCAL CORDS:
The vocal cords are at the centre of the voice box and make the sounds when you talk, sing, cough or hum. They are folds of membrane lining
that vibrate when air flows through them to the lungs.
6. TRACHEA:
The trachea which is also known as the windpipe, takes air from the vocal cords to the lungs. It has ribs of cartilage to keep it open.
7. BRONCHIAL TREE:
The bronchial tree take the air to the bottom of the lungs.
8. LUNGS:
In the lungs, thousands of tiny air sacs called alveoli extend from the end of the smallest bronchioles. They look a bit like bunches of grapes
hanging off a stem. The left and right lungs are about the same size, except that the left lung has an indentation at the bottom to allow room for
the heart.
9. ALVEOLI:
Oxygen enters your bloodstream through a process called 'respiration'. The walls of the alveoli are thin, allowing oxygen from the inhaled air to
pass through where it's picked up by passing red blood cells. This 'oxygenated' blood will travel throughout the body, providing vital fuel living
cells need. After delivering its oxygen, the 'deoxygenates' blood returns to the lungs. Back at the lungs, Co2 passes through the thin walls of the
alveoli and leaves the lungs when you exhale.

< Equation of the Respiration >
Carbohydrates(Glucose) + Oxygen --> Carbon dioxide released into the air + Water + Energy.

Difference between Breathing and Respiration:
Breathing is a constant process where you breathe in and out constantly through out the day. Respiration is a process where the body breaks down the oxygen, so that the cells in the body can use it.

Respiratory system helps in compounding air we breathe and glucose into energy. Energy is one of the most important because energy helps in our daily activities.

Breathing is a constant process where you breathe in and out constantly through out the day. Respiration is a process where the body breaks down the oxygen, so that the cells in the body can use it.