Biology

2. clusters of tiny air sacks in the lungs
4. The break down of food physically and chemically
6. tiny thin walled blood vessels that allow exchange of nutrients and wastes between the blood and body tissues by diffusion
8. the process of taking in oxygen
11. Nutrients diffuse or are moved into the blood

1. The respiratory system includes many different organs that work together for gas exchange to take place
2. carries oxygenated blood away from the heart, with thick walls it withstands high pressure
3. the organ system that is made up of the heart, the blood and the blood vessels.
5. the removal of solid waste from the digestive system to the body
7. the taking in of nutrients
9. Type of connective tissue that circulates through all parts of the body
10. tiny cells that help in blood clotting. they make up less than 1% of blood volume