Circulatory System Questions
1. Pretend you are a blood cell returning to the heart through the superior vena cava. List all
the structure of the heart you must pass through on your way to the lungs to get oxygen
and to the rest of the body through the aorta.
2. Complete the following statement:
“All blood vessels that carry blood away from the heart are called
___________________________. All blood vessels that carry blood towards the heart are called
___________________________. All arteries carry oxygenated blood except for the
___________________________ artery. All veins carry deoxygenated blood except for the
___________________________ vein.
3. When a red blood cell leaves the heart and reaches the capillaries, what does it drop off and
what does it pick up?
4. The left ventricle is much thicker and stronger than the right ventricle. Why do you suppose
this is?
5. Carbon monoxide is a deadly poisonous gas that is clear, colourless and odourless. It is
produced when something burns and there very little oxygen. The reason it is poisonous is
because it binds to the red blood cells better than oxygen. Why is this so dangerous? If a
patient came into the hospital with carbon monoxide poisoning, what would a doctor do for
6. Blood does many things besides just carrying oxygen to the body. Give two other very
important functions of blood.