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What is the primary function of anastomoses in blood vessels?
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19. The Blood Vessels
Anastomoses
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Which of the following is a reason that the retina, kidney, & spleen may be more susceptible to cell death than other organs?
A
Arteries that supply these organs do not have many anastomoses.
B
Veins that carry blood away from these organs do not have many anastomoses.
C
There are very few arteriovenous anastomoses near these organs.
D
They have many capillary beds.
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Understand the concept of anastomoses: Anastomoses are connections between blood vessels that allow for alternative pathways for blood flow. They are crucial for maintaining blood supply if one pathway is blocked.
Identify the role of arteries and veins: Arteries carry oxygenated blood to organs, while veins carry deoxygenated blood away. The presence of anastomoses in these vessels can affect the organ's susceptibility to ischemia (lack of blood supply).
Consider the impact of limited anastomoses: Organs with fewer arterial anastomoses are more vulnerable to ischemia because there are fewer alternative routes for blood to reach the tissue if a blockage occurs.
Analyze the options: The options mention arteries, veins, and arteriovenous anastomoses. Focus on the role of arterial anastomoses in supplying blood to the organs.
Conclude based on the analysis: The retina, kidney, and spleen are more susceptible to cell death due to limited arterial anastomoses, which restricts alternative blood supply routes, making them vulnerable to ischemic damage.
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