Breast

Breasts are made up of breast tissue (also called glandular tissue) and fat, along with nerves, veins, arteries, and connective tissue that helps hold everything in place. Breast tissue is a complex network of lobules (small round sacs that produce milk) and milk ducts (canals that carry milk from the lobules to the nipple openings during breastfeeding) in a pattern that looks like bunches of grapes. These “bunches” are called lobes.