Breast anatomy. 1866 illustrations showing the anatomy of a human breast. Fig. 1: cutaway of the breast, showing the lymph vessels (white lines, left), milk (lactiferous) ducts (white, branching, right), nipple (centre) and surrounding pectoral muscle (brown). Fig. 2: section through the breast, showing the milk ducts (white lines) leading to the nipple (left), with the underlying mammary tissue. Fig. 3: A lobule of alveoli (round) from the mammary tissue, with milk ducts (white).