Question

question 8 of 10
where does carbon dioxide move from the circulatory system to the respiratory system?
a. in the vena cava
b. in the liver
c. in the alveoli
d. in the pulmonary artery

Explanation:

The alveoli are tiny air - sacs in the lungs. Gas exchange occurs here. Carbon dioxide moves from the blood (circulatory system) into the alveoli (respiratory system) and then is exhaled. The vena cava is a large vein that returns deoxygenated blood to the heart. The liver is involved in metabolism, detoxification, etc. The pulmonary artery carries deoxygenated blood from the heart to the lungs but gas exchange (carbon dioxide moving from circulatory to respiratory) occurs specifically in the alveoli.

Answer:

C. In the alveoli