Question Detail

ZOO 101 Mammalian Circulatory System Objective Question

Question

What is the structure of a capillary wall?
Options
A Thick with multiple layers of muscle.
B Composed of a single layer of cells.
Correct Answer
C Composed mainly of elastic fibres.
D It has valves to prevent backflow.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Capillaries are composed of a single layer of cells (endothelium).

Hint

This thinness allows for easy exchange of substances.

Question Info