Question

The mammary glands are paired structures (breasts) that
contain glandular tissue and variable amounts of fat. The
glandular tissue of breast is divided into

• A. $15-20$ mammary alveoli
  
• B. $12-16$ mammary tubules
  
• C. $15-20$ mammary lobes
• D. $10-12$ mammary lobes
  

Answer 1

The correct option is C $15-20$ mammary lobes

Mammary glands
Mammary glands are the modified sweat glands that contain glandular tissue and variable amounts of fat. They are present in the chest region.

Structure of mammary glands
Structure of mammary gland includes the following:
● The glandular tissue present in each mammary gland is divided into $15-20$ mammary lobes.
● These mammary lobes contain clusters of cells called alveoli.
● Milk is produced by the cells of alveoli and is stored in the lumen of alveoli.
● All alveoli of a mammary lobe open into a common tubule called mammary tubule.
● Tubules of each mammary lobe join to form a common duct called mammary duct.
● Ampulla is formed by the joining of multiple mammary ducts.
● Ampulla releases milk in the lactiferous duct which has an opening in the nipples from where milk is released.

Pictorial representation of mammary gland

Final answer
(d) 15-20 mammary lobes