pick the correct statement

Options

A. Contraction of internal intercostal muscles lifts up the ribs and sternum.
B. RBCs transport oxygen only
C. Thoracic cavity is anatomically an air tight chamber.
D. Healthy man can inspire approximately 500 mL of air per minute.

Answer

C

Explanation

Contraction of external intercostal muscles lifts up the ribs and sternum.
RBCs transport both oxygen and `CO_(2)`.
Healthy man can inspire approximately 6000-8000 mL of air per minute.