Multiple Choice
Which of the following is a reason that the retina, kidney, & spleen may be more susceptible to cell death than other organs?
19. The Blood Vessels
Anastomoses
Problem 2
Textbook Question
Locations where vessels connect via collateral vessels are known as:
a. Thoroughfare channels
b. Metarterioles
c. Anastomoses
d. Venules
Verified step by step guidance1
Understand the key terms in the question: Collateral vessels refer to alternative pathways for blood flow, which are formed when vessels connect to bypass blockages or provide additional circulation.
Review the definitions of the options provided: Thoroughfare channels are direct pathways through capillary beds, metarterioles are small vessels that connect arterioles to capillaries, anastomoses are connections between blood vessels allowing for collateral circulation, and venules are small veins that collect blood from capillaries.
Focus on the concept of collateral circulation: Collateral vessels are specifically associated with anastomoses, which are connections between arteries, veins, or other vessels that allow blood to bypass blockages or provide redundancy in circulation.
Eliminate incorrect options: Thoroughfare channels and metarterioles are part of the microcirculation system but do not serve as collateral vessels. Venules are involved in returning blood to the heart but are not sites of collateral connections.
Conclude that the correct term for locations where vessels connect via collateral vessels is anastomoses, based on the definition and function of these connections.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Collateral Circulation
Collateral circulation refers to the network of small blood vessels that can develop to provide alternative pathways for blood flow when the main vessels are obstructed. This is crucial in maintaining adequate blood supply to tissues, especially in cases of vascular disease or injury.
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Anastomoses
Anastomoses are connections between two blood vessels, allowing for the diversion of blood flow. They can occur between arteries, veins, or a combination of both, and play a vital role in ensuring that blood supply remains consistent even if one pathway is compromised.
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Metarterioles
Metarterioles are small blood vessels that serve as a transitional form between arterioles and capillaries. They regulate blood flow into capillary beds and can also connect directly to venules, facilitating the exchange of nutrients and waste products in tissues.
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