Respiratory System

5. A thin band of muscle between two ribs that helps with breathing
7. “______ system” A group of organs that work together to perform a function
8. “______ exchange”: The movement of oxygen into the blood and carbon dioxide out of it
10. A tube that carries air through a lung
12. The movement of substances through tiny holes into the bloodstream
14. The common pathway for air and food
16. An organ where gas exchange occurs between air and blood
18. An opening in the nose where incoming air is warmed and filtered

1. A body part that performs a specific function
2. “__________ respiration”: The process used by all living cells to release energy
3. A thin layer that forms a barrier
4. “_______ dioxide”: A gas produced as waste when cells release energy
6. The main airway between the throat and the lungs
9. A large sheet of muscle that contracts to draw gas into the lungs
10. The process used by animals to exchange gases with the atmosphere
11. A flap of cartilage that stops food entering the trachea
13. A gas needed by cells to release energy
15. The upper part of the trachea, containing the vocal cords
17. A tiny air sac in a lung where gas exchange occurs