Description
This artistic rendering of the breast shows the lobes that make up the glandular tissue of the breast, each subtended by a lactiferous duct that exits at the nipple. Image b shows a single lobe made up from 20-40 lobules that look like white clumps of grapes. The lobules (c) have an extra-lobular ductule that connects to the main duct. The lobules are composed of tear dropped shaped glandular sacs called acini, (d) or alveoli which are lined by an inner epithelium (e) that contains cuboidal cells which secrete milk and outer smooth muscle cells that enable the glandular tissue to contract and help transport the milk to the nipple . Intra-lobular ductules connect with the extra-lobular ductule.