Nipple
The nipple is a raised region of tissue on the surface of the breast from which, in lactating females, milk from the mammary gland leaves the body through the lactiferous ducts to nurse an infant. The milk can flow through the nipple passively, or it can be ejected by smooth muscle contractions that occur along with the ductal system. The nipple is surrounded by the areola, which is often a darker colour than the surrounding skin.
Read Full WikiDEFINITIONS
- nounThe projection of a mammary gland from which, on female mammals, milk is secreted.
- nounA mechanical device through which liquids or gases can be passed in a regulated manner.
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