the terms to their correct locations in the paragraph. Gas exchange between an o

Question

the terms to their correct locations in the paragraph. Gas exchange between an organism and its environment provides O_2 for and removes the waste product CO_2. In humans, gas exchange takes place across thin-walled sacs in the lungs called. Ventilation of the lungs occurs by. An increase in in the blood-- and a resulting drop in pH--signals the breathing control center in the brain to increase the breathing rate. This keeps gas exchange in tune with body needs. The right side of the heart pumps blood returning from body tissues to in the lungs. There, CO_2 diffuses out of the blood and O_2 diffuses into the blood and binds to in red blood cells. Blood from the lungs returns to the left Side of the heart and is pumped throughout the body, providing to tissue cells.

Explanation / Answer

1. cellular respirtion.

2. Alveoli

3. Negative pressure breathing

4. Carbon dioxide

5. Capillaries

6. hemoglobin

7. Oxygen

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