What role do myoepithelial cells play in lactation?

Myoepithelial cells play a crucial role in lactation by assisting in the ejection of milk from the mammary glands. These specialized cells are located between the basal lamina and the epithelial cells of the alveoli in the breast. When stimulated, often by the hormone oxytocin released during breastfeeding, myoepithelial cells contract. This contraction exerts pressure on the milk-filled alveoli, facilitating the movement of milk through the ducts toward the nipple, enabling the infant to receive milk during nursing.

This function is essential during lactation, ensuring that milk is successfully ejected from the alveoli into the ducts for feeding. Understanding this mechanism highlights the importance of myoepithelial cells in the lactation process and their role in the physiological support of breastfeeding.