Note that the intralobular ducts branch frequently but have no secretory acini at their endings. Another view of intralobular ducts of an inactive gland. Dense connective tissue and fat cells lie in the surrounding interlobular septa. The connective tissue stroma within the lobule is more cellular than the interlobular connective tissue outside. Note large interlobular ducts lying in the septa.
Lobules now seem more comparable to the kind of thing seen in the salivary gland.
Secretion of watery cholostrum precedes the secretion of true milk, which does not come until after the birth of the child. Slide 48 Detail of secretory acini of the proliferating mammary gland. An intrabular blood vessel is evident in the upper left quadrant of the field. Notice the branching, tubular shapes to some of the secretory units. The lobule to the right has emptied its contents.