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Which of the following does not contribute to venous return?
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19. The Blood Vessels
Introduction to Blood Vessels
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Which small blood vessels are responsible for distributing blood throughout the body?
A
Arteries
B
Veins
C
Capillaries
D
Venules
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Understand the role of different blood vessels: Arteries carry blood away from the heart, veins carry blood back to the heart, and capillaries are involved in the exchange of materials between the blood and tissues.
Recognize that capillaries are the smallest blood vessels in the body, forming a network that connects arterioles and venules.
Capillaries have thin walls that allow for the exchange of oxygen, nutrients, and waste products between blood and surrounding tissues.
Identify that the primary function of capillaries is to facilitate the distribution of blood to tissues and organs, ensuring that cells receive necessary nutrients and oxygen.
Conclude that capillaries are responsible for distributing blood throughout the body, as they are the sites of exchange between the bloodstream and body tissues.
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