Anatomy & Physiology Circulatory #6

Question

Which student statement is correct in regard to the movement of blood through the veins?

Answers

  1. “Veins have thin walls which allow for the movement of blood via diffusion.”
    • Rationale:

      While veins do have thin walls, this is not what allows for the movement of blood by diffusion within the human body; therefore, this is not a correct student statement.

  2. “Skeletal muscle movement is the fuel that moves blood through the veins.”
    • Rationale:

      Veins do not have the muscle needed to move blood back to the heart; instead, it is the movement of the body’s skeletal muscles that push the blood back to the heart.

  3. “The cardiac muscle is responsible for the movement of blood through the veins.”
    • Rationale:

      The heart, or cardiac muscle, is not responsible for moving blood throughout the circulatory system of the body; therefore, this is not a correct student statement.

  4. “Veins and arteries both have a muscular layer that allows for the movement of blood.”
    • Rationale:

      Veins lack the muscular layer that arteries have allowing blood movement to occur; therefore, this is not a correct student statement.

Overview

A vein is defined as any of the tubes forming part of the circulatory system of the body.

Explanation

Learning Outcomes

All veins with the exception of the pulmonary vein carry oxygen-depleted blood toward the heart. Veins, unlike arteries, do not have a muscular layer that allows for the movement of blood. Instead, blood is moved through the veins by skeletal muscle movement that serves as fuel.

Test Taking Tip

Ask yourself if each statement is true or false. The true statement is the correct choice for this question.

Video Rationale