This realistic 2-part model comes hinged on a stand and swings open to depict the interior structures of the human breast and mammary glands during lactation. Includes detailed representations of all major functions such as the nipple, areola, lactiferous duct, lobules, fatty tissue, muscle and chest wall. All significant features are numbered and identifiable on the included key. Model is made exclusively from high quality medical PVC. Perfect for educating students and expectant mothers.