Mammary gland luminal epithelium

Definition

The inner cell layer of the mammary epithelium bilayer that lines the luminal surface of mammary gland ducts and alveoli; luminal cells have only limited contact with the underlying basement membrane and surrounding connective tissue; they are secretory epithelial cells characterized by the expression of the receptors for systemic hormones, i.e. estrogens, progesterone and prolactin.

Also known as lumina layer of epithelium of lactiferous gland — per UBERON

The Mammary gland luminal epithelium is a part of the None.