Question Detail

ZOO 101 ZOO 101 Past Questions Objective Question
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Question

Capillaries are unique among blood vessels because their walls are composed of:
Options
A Smooth muscle and elastic fibres
B A single layer of cells (thin endothelium)
Correct Answer
C Three distinct tunics — intima, media, and adventitia
D Fibrous connective tissue with valves
Correct Answer

Option B is the correct answer.

Detailed Explanation

Capillaries are unique because their walls are composed of a single layer of cells (thin endothelium). This thin structure allows for efficient exchange of gases, nutrients, and wastes between blood and surrounding tissues.

Hint

This single-cell-thick structure facilitates diffusion between blood and tissues.

Question Info

Course: ZOO 101
Topic: ZOO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1004 of 2214
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