The Vital Link Between the Alveoli and the Body Cells

Question

The vital link between the alveoli and the body cells is the _______.
A) bronchial tree
B) diaphragm
C) circulatory system
D) lungs

Accepted Answer

The circulatory system, consisting of the heart, blood vessels, and blood, is responsible for transporting oxygenated blood from the alveoli to the body cells and returning deoxygenated blood from the body cells to the alveoli for gas exchange. The bronchial tree and lungs are involved in breathing and oxygen exchange, while the diaphragm is a muscle involved in breathing by helping to expand the lungs.