Question

The diagram below represents part of a capillary in a specific region of the human body. The region labeled X represents part of–

• A. A glomerulus
• B. An alveolus
• C. A villus
• D. The liver

Answer 1

The correct option is B An alveolus

An alveolus is a tiny air sac in the lung. It is the actual part of the lung that exchanges atmospheric oxygen with carbon dioxide from the blood.
A glomerulus is a ball of capillaries found in the nephrons of the kidneys (to filter nitrogenous wastes).
A villus is a tiny projection of capillaries in the small intestine (to absorb digested food).
The liver is the site of bile production and breakdown of amino acids.
So, X in the figure represents 'alveolus'.
So, the correct answer is option 'b'.