Alveoli

Definition

Alveoli in the context of the ovarian reproductive system refer to the small, sac-like structures within the mammary glands where milk is produced and secreted during lactation. Each alveolus is lined with milk-producing epithelial cells and surrounded by myoepithelial cells that help expel milk into the ducts leading to the nipple.

Related terms

Lactation: The process by which milk is synthesized, secreted, and ejected from the mammary glands of postpartum females in response to hormonal signals.

Mammary Glands:

Specialized organs in mammals that produce milk to nourish newborn offspring; consist of lobules containing alveoli.

Myoepithelial cells: Specialized cells that line the alveoli and ducts of mammary glands, contracting to facilitate the expulsion of milk