The blood-pumping action of respirations and skeletal muscle contractions are both important factors promoting the return of venous blood to the heart.

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Both respirations (breathing) and skeletal muscle contractions play a role in promoting the return of venous blood to the heart. During inhalation, negative pressure in the chest cavity helps to pull blood towards the heart, while during exhalation, pressure in the chest cavity helps to push blood towards the heart. Meanwhile, skeletal muscle contractions help to compress veins and push blood towards the heart. Together, these mechanisms aid in venous return.

The Blood-Pumping Action of Respirations and Skeletal Muscle Contractions Are