Chapter 17 (Exam Prep)

2. cavity, The area inside the nose that warms and moistens incoming air
4. blood cell, a blood cell that attacks foreign invaders
5. the fluid, composed mainly of water, that makes up slightly more than half of the volume of blood
7. pressure, The pressure of circulating blood against he walls of arteries
10. a tiny sac where gas is exchanged between the air in the lungs and the blood
12. a tiny blood vessel connecting an artery and a vein
13. Lower chambers of the heart
15. a light change in blood pressure in an artery when the heart beats
16. a blood vessel leading toward the heart
17. A blood vessel that leading away from the heart

1. The organ that conducts air toward the lungs
3. an upper chamber of the heart
5. a structure in the blood that repairs breaks in the circulatory system
6. Either of the two branches of the trachea that lead into a lung
8. The organ that helps prevent food from entering the trachea and contains the vocal cords
9. node, a structure along the lymphatic system that filters dead cells, bacteria, viruses, and other particles out of the lymph
11. a flap in a vein that allows blood to flow in only one direction
14. Leaked plasma that flows through the lymphatic system and back into the circulatory system
15. The organ that connects the passages of the nose and mouth to the esophagus
18. blood cell, a blood cell that lacks a nucleus and carries oxygen to the cells