What occurs during contraction of the calf muscle pump?

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Prepare for the Clinical Sonography III Exam with flashcards and multiple choice questions. Each question includes hints and explanations. Excel in your exam!

Multiple Choice

What occurs during contraction of the calf muscle pump?

Explanation:
When the calf muscles contract, they compress the deep veins in the calf, squeezing the blood upward toward the thigh and out of the calf. This action propels venous blood toward the heart. The valves inside these deep veins work to maintain one-way flow: distal valves close to prevent backflow as pressure rises, and proximal valves open to allow blood to move upward. So the primary effect of the calf muscle pump is to push the deep-calf venous blood up and out of the calf, enhancing venous return.

When the calf muscles contract, they compress the deep veins in the calf, squeezing the blood upward toward the thigh and out of the calf. This action propels venous blood toward the heart. The valves inside these deep veins work to maintain one-way flow: distal valves close to prevent backflow as pressure rises, and proximal valves open to allow blood to move upward. So the primary effect of the calf muscle pump is to push the deep-calf venous blood up and out of the calf, enhancing venous return.

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