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Lactation

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The primary function of female breasts is to produce milk in order to nourish an infant, a process called lactation. The breasts, which are composed primarily of fatty tissue, also contain milk producing glands called lobules. Lobules are connected to the nipple by a network of tubes called milk ducts. The breasts produce milk from water and nutrients removed from the bloodstream. The milk is stored in the lobules until the hormone oxytocin signals the tiny muscles in the lobules to contract, and push the milk through the ducts. This process is called let-down reflex or the milk-ejection reflex.

Duration: 00:49

Published: 11/26/2015

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