Question

Which two things happen during gas exchange in an animal? A. Oxygen moves from blood vessels into the lungs. B. Carbon moves from the blood into the lungs. C. Blood moves from blood vessels into the lungs. D. Oxygen moves from the lungs into the blood.

Answer 1

Answer:

Options B and D

Explanation:

In animals, gaseous exchange takes place in the alveoli in the lungs. Generally, animals breath-out (exhale) carbon dioxide and breath-in (inhale) oxygen. Thus, carbon moves from the blood in the form of carbon dioxide into the alveoli in the lungs while the oxygen inhaled moves from the alveoli in the lungs to the blood where it is transported round the body as oxyhaemoglobin.

Answer 2

Answer:

B. Carbon moves from the blood into the lungs.

D. Oxygen moves from the lungs into the blood.

Explanation:

During respiration, humans take in air which contains oxygen and the oxygen gas then moves from the lungs into the blood . The blood helps to distribute the oxygen to other parts of the body for their proper functioning.

When we breathe out, we give out carbon dioxide as a result of the carbon which is taken up from the blood into the lungs and subsequently given out to be used by plants for their photosynthetic processes.