And when the milk is produced and released, it is released into these milk ducts and these ducts act as passageways. They allow the movement of the milk from the lobules of granular tissue and to the nipple where the nipple has very tiny holes that allows the passageway of the milk out of that breast. Now, the nipple also contains nerve endings as we'll see in just a moment. And when the baby sucks on the nipple, the nerve essentially creates action, potentials electrical signals that propagate all the way to the hypothalamus. And the hypothalamus stimulates the posterior and anterior pituitary gland to basically release special hormones as we'll see in just a moment. And these hormones stimulate the process of lactation the production and the release of milk.