Which of the following are found in many veins that help direct blood flow in one direction only: toward the heart?

Name: Which of the following are found in many veins that help direct blood flow in one direction only: toward the heart?
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Question

Quizplus · Accepted Answer

Valves are found in many veins, particularly in the legs, to prevent backflow of blood and direct it toward the heart. Lymph nodes, myocardium, and pericardium are not directly involved in directing blood flow in veins.

Which of the Following Are Found in Many Veins That