What best describes functional end arteries?

What best describes functional end arteries?

• A. Arteries that have abundant collateral supply and never run at risk of causing tissue ischemia
• B. Arteries with structural anastomoses that always ensure continuous blood flow
• C. Arteries that, despite having structural anastomoses, can lead to insufficient blood flow if blocked
• D. Arteries that are only found in the heart and have no collateral connections

Answer: (C)

Functional end arteries are vessels that primarily supply a tissue with little collateral support. They may have some structural connections (anastomoses), but these routes are not sufficient to maintain adequate blood flow if the main artery is blocked. So, occlusion can lead to ischemia or infarction in the territory they serve, even though small collateral channels exist. That’s why the idea of abundant collateral supply preventing ischemia is incorrect, and why the presence of some anastomoses does not guarantee continuous flow. These arteries aren’t unique to the heart; other organs have vessels that behave this way as well.

Functional end arteries are vessels that primarily supply a tissue with little collateral support. They may have some structural connections (anastomoses), but these routes are not sufficient to maintain adequate blood flow if the main artery is blocked. So, occlusion can lead to ischemia or infarction in the territory they serve, even though small collateral channels exist. That’s why the idea of abundant collateral supply preventing ischemia is incorrect, and why the presence of some anastomoses does not guarantee continuous flow. These arteries aren’t unique to the heart; other organs have vessels that behave this way as well.