In the respiratory pump process to increase venous return, inhalation results in a(n) in the thoracic cavity, which causes the inferior vena cava and right atrium to expand and fill with blood.

Decrease in pressure

Explanation:

In the respiratory pump process to increase venous return, inhalation results in a decrease in pressure in the thoracic cavity, which causes the inferior vena cava and right atrium to expand and fill with blood.

answer; i believe the answer is (biomedical); plz check first good luck

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