Immediately behind the nipple, there is a widened area of the collecting duct called the

Immediately behind the nipple, there is a widened area of the collecting duct called the

• A. Lactiferous duct
• B. Ductal ampulla
• C. Milk storage duct
• D. Lactiferous sinus

Answer: (D)

The main concept is the structure of the breast’s duct system and where milk is stored just behind the nipple. Milk produced in the lobules travels through ducts and, as they approach the nipple, widen into a small reservoir. This dilated area behind the nipple is called the lactiferous sinus. It serves as a temporary storage site for milk before it exits through the nipple pores during lactation. Other terms don’t fit as well: the lactiferous duct refers to the slender channel that carries milk toward the nipple, not the enlarged storage area. The term ductal ampulla is sometimes used in different contexts but isn’t the standard label for this specific behind-the-nipple reservoir. “Milk storage duct” isn’t a recognized anatomical term. So the proper name for that widened behind-nipple segment is the lactiferous sinus.

The main concept is the structure of the breast’s duct system and where milk is stored just behind the nipple. Milk produced in the lobules travels through ducts and, as they approach the nipple, widen into a small reservoir. This dilated area behind the nipple is called the lactiferous sinus. It serves as a temporary storage site for milk before it exits through the nipple pores during lactation.

Other terms don’t fit as well: the lactiferous duct refers to the slender channel that carries milk toward the nipple, not the enlarged storage area. The term ductal ampulla is sometimes used in different contexts but isn’t the standard label for this specific behind-the-nipple reservoir. “Milk storage duct” isn’t a recognized anatomical term. So the proper name for that widened behind-nipple segment is the lactiferous sinus.