Science System Crossoword

3. branches from the trachea into two large large tubes called ___
4. thin wall-only one cell thick-and is surrounded by very thin capillaries
8. - procedure in which an artificial kidney machine filters out wastes and toxins from patients blood
10. - the main excretory organ of the body
14. cortex - the outer portion of the kidneys
15. - waste product that leaves the kidneys through the ureters
16. the muscle that contracts and relaxes during exhalation and inhalation
17. crystalized calcium compound formed in the kidneys
18. - excreted by the skin
19. dioxide - primarily excreted by the lungs

1. - the ____ system includes the lungs, skin, and kidneys.
2. the flap of tissue which covers the opening to the larynx
5. __ respiration is the exchange of gases between the atmosphere and the blood
6. box another name for the larynx(two words)
7. the mechanical movement of air into and out of your lungs
9. ___ respiration is the exchange of gases between the blood and the body cells
11. the largest organ in the respiratory system
12. - nitrogenous waste product
13. long tube in the chest cavity
16. - the most hazardous outcome of kidney failure and waste build up