The respiratory pump is an important mechanism for venous return for the:
A)jugular veins
B)veins of the arms
C)veins of the legs
D)veins in the thoracic cavity

Question

Quizplus · Accepted Answer

The respiratory pump is an important mechanism for venous return for the veins in the thoracic cavity. During inspiration, the diaphragm contracts and the thoracic cavity expands. This creates a negative pressure in the thoracic cavity, which draws blood into the veins in the thorax.

The Respiratory Pump Is an Important Mechanism for Venous Return