Anatomy & Physiology Circulatory #4

Question

Which structure is the site for gas exchange within the body’s circulatory system?

Answers

  1. Veins
    • Rationale:

      Veins are not the site for gas exchange within the body’s circulatory system.

  2. Venules
    • Rationale:

      Venules are not the site for gas exchange within the body’s circulatory system.

  3. Arteries
    • Rationale:

      Arteries are not the site for gas exchange within the body’s circulatory system.

  4. Capillaries
    • Rationale:

      Capillaries are any of the small branching blood vessels that form a network between arterioles and venules within the human circulatory system. This is the site for gas exchange.

Overview

Gas exchange is defined as the diffusion of gases from areas of higher concentration to areas of lower concentration.

Explanation

Learning Outcomes

In the human body, gas exchange is referred to as the exchange of oxygen and carbon dioxide between the cells of the body and its environment. Gas exchange occurs within the capillaries of the circulatory system. A capillary is defined as any of the small branching blood vessels that form a network between the arterioles and venules within the human body.

Test Taking Tip

Consider the function of each answer choice to determine the correct answer for this question.

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