Question

In humans, mammary glands are divided into ___ lobes:

• A. 10 – 12
• B. 25 – 30
• C. 30 – 35
• D. 15 – 20

Answer 1

The Correct Option is D

In humans, the mammary glands are specialized structures responsible for the production and secretion of milk. Each mammary gland is composed of lobes, which are essential for its function. The correct answer to how many lobes the mammary glands are divided into is 15–20 lobes.

The lobes within the mammary glands are further divided into smaller structures called lobules, which contain clusters of alveoli. These alveoli are the sites for milk production, and they connect to milk ducts that transport milk to the nipple. This anatomical organization facilitates the efficient production and delivery of milk. 

Thus, the correct number of lobes in human mammary glands is expressed as the range 15 to 20 lobes, highlighting the slight variation that can occur naturally across individuals.

Answer 2

(1) 10 – 12

This statement is incorrect. The human mammary gland typically has more than 10-12 lobes.

(2) 25 – 30

This statement is incorrect. The human mammary gland typically does not have 25-30 lobes.

(3) 30 – 35

This statement is incorrect. The human mammary gland typically does not have 30-35 lobes.

(4) 15 – 20

This statement is correct. The human mammary gland is typically divided into 15-20 lobes. Each lobe consists of lobules that contain milk-producing alveoli.

Conclusion

The correct answer is (4) 15 – 20. The human mammary gland is generally divided into 15-20 lobes.