part of part of develops from develops from glandular secretory epithelial cell milk secreting cell general ecto-epithelial cell lactocyte 2010-09-20T01:30:57Z mammary alveolar epithelial cell lactation-derived mammary cell mammary alveolar cell luminal cell of alveolus of lactiferous gland lactaction-associated mammary epithelial cell FMA:79866 mammary gland alveolar epithelial cell A milk-producing glandular epithelial cell that is part of a mammary gland alveolus and differentiates from a luminal adaptive secretory precursor cell during secretory differentiation (also termed lactogenesis I). Following secretory activation (also termed lactogenesis II), a lactocyte is involved in the synthesis and/or transport of milk constituents including proteins, oligosaccharides, lactose, micronutrients, fat, hormones, immunoglobulins, and cytokines into the lumen of the lactating mammary gland. FMA:74506 epithelial cell of lactiferous gland mammary gland glandular cell luminal adaptive secretory precursor cell of mammary gland mammary gland alveolus