Which breast structure serves as the drainage channel from the lobes toward the nipple?

Which breast structure serves as the drainage channel from the lobes toward the nipple?

• A. Lactiferous ducts
• B. Mammary glands
• C. Alveolar ducts
• D. Duct of Montgomery

Answer: (A)

Milk is produced in the glandular tissue of the breast within the lobes, then drains through a progression of ducts toward the nipple. Within each lobe, milk moves from the alveoli into the alveolar ducts, which feed into larger lactiferous ducts. These ducts run toward the nipple and converge to form the lactiferous sinus beneath the areola before milk exits through the nipple. This network of lactiferous ducts is the main drainage pathway from the lobes to the nipple. Other structures have different roles: mammary glands refer to the whole gland, alveolar ducts are smaller ducts within the lobes that drain the alveoli, and the Duct of Montgomery are sebaceous glands around the areola involved in lubrication, not milk drainage.

Milk is produced in the glandular tissue of the breast within the lobes, then drains through a progression of ducts toward the nipple. Within each lobe, milk moves from the alveoli into the alveolar ducts, which feed into larger lactiferous ducts. These ducts run toward the nipple and converge to form the lactiferous sinus beneath the areola before milk exits through the nipple. This network of lactiferous ducts is the main drainage pathway from the lobes to the nipple. Other structures have different roles: mammary glands refer to the whole gland, alveolar ducts are smaller ducts within the lobes that drain the alveoli, and the Duct of Montgomery are sebaceous glands around the areola involved in lubrication, not milk drainage.