Biology Circulation / Transport ETEA 2023 Retake
PMDC Verified Question 22 of 54
Which of the following is known as the vessels of the vessels?
A
Vasa vasorum
B
Tunica media
C
Tunica externa
D
Tunica interna
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Vasa vasorum
Concept:

Large blood vessels are so thick that the cells in their outer layers cannot receive oxygen and nutrients by simple diffusion from the blood flowing inside them.

Formula:

None

Solution:

  • Large arteries and veins (like the aorta and vena cava) require their own dedicated microscopic blood supply.


  • This network of tiny blood vessels embedded in the tunica externa of large vessels is termed the vasa vasorum.


  • The direct translation of "vasa vasorum" from Latin is "the vessels of the vessels."


Why other options are incorrect:

  • Tunica media/externa/interna: These are the tissue layers of the blood vessel wall, not the micro-vessels feeding them.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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