The breasts project anterior to the pectoralis muscle. The nipple is a pigmented projection from which milk emerges from lactiferous ducts. The areola is the pigmented area around the nipple.
Lactation is the production and release of milk. Alveoli are milk-secreting glands located within the lobules of the breast. Oxytocin causes milk ejection during nursing by contraction of myoepithelial cells around the lactiferours ducts. Prolactin stimulates milk secretion for the next feed. Colustrum is a thin milk released the first few days after birth.
Making a Difference in the World 