Circulatory and Respiratory System

2. the process of the diaphragm and intercostal muscles relaxing resulting in carbon dioxide being pushed out of the lungs.
3. the respiratory system is for breathing and gas __________ .
5. the part of the circulatory system that pumps blood to the heart and back
10. the liquid portion of blood that carries nutrients, hormones, and waste products through the body.
12. the windpipe that directs air into the lungs
15. small branching tubes that carry air deeper into the lungs.
16. The circulatory system delivers _______ and nutrients to cells
17. tiny balloon-like sacs at the end of the bronchioles that provide surface area for gas exchange.
18. the two top chambers of the heart
20. this body part filters, warms, and moistens air as it enters the body.
21. during inhalation, the diaphragm ________ and the chest cavity grows larger.
22. the two bottom chamber of the heart
23. the total number of chambers in the heart

1. Help the body fight infections and are important part of the immune system.
4. the act of oxygen passing through the alveoli into nearby capillaries
6. blood vessels that carry blood away from the heart
7. the voice box
8. a large dome-shaped muscle located below the lungs that plays an important role in breathing.
9. Responsible for carrying oxygen from the lungs to the body’s tissues and bringing CO₂ back to the lungs for exhalation
11. the part of the circulatory system that pumps blood to tissues and cells all over the body.
13. The circulatory system is a network that allows ______ to flow through the body
14. A common waste product of the circulatory and respiratory systems.
19. small cell fragments that play a role in blood clotting. These help to stop bleeding when we get a cut.
21. tiny blood vessels that connect arteries to veins
22. blood vessels that carry blood back to the heart