2. How many chambers does the human heart have? What are their names?
3. What are the three kinds of blood vessels? What are their jobs?
4. What is a pulse?
5. What is plasma and what is its job?
6. What is the job of red blood cells?
7. What is the job of white blood cells?
8. What are platelets and what is their job?
9. How does blood flow through the heart?
10. What happens when you breathe?
11. What happens in your body when you inhale?
12. What happens in your body when you exhale?
13. Why is exercise good for you?