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Lactation Physiology

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Milk Ejection Reflex

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The milk ejection reflex is a neurohormonal reflex that expels milk from the alveoli into the ducts. It's important for distributing milk when the infant suckles.

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Lactogenesis

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Lactogenesis is the process that initiates milk secretion. It is important for providing nutrition to the newborn.

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Caseins

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Caseins are a family of phosphoproteins that are the main proteins in milk and cheese. They provide essential amino acids and stabilize calcium phosphate in the milk.

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Prolactin

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Prolactin is a hormone secreted by the anterior pituitary gland that stimulates milk production. It plays a key regulatory role in lactation.

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Galactopoiesis

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Galactopoiesis is the maintenance phase of lactation where the established milk production is sustained. This phase is crucial for ensuring a consistent milk supply to the infant.

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Mammary Gland

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The mammary gland is an exocrine gland in mammals that produces milk to feed young ones. It's a key reproductive feature supporting offspring growth and survival.

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Colostrum

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Colostrum is the first form of milk produced immediately following delivery. It's rich in antibodies and essential nutrients vital for the newborn's immune system.

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Alveoli

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Alveoli are the small milk-producing sacs within the mammary gland. They're critical for milk production and storage prior to feeding.

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Oxytocin

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Oxytocin is a hormone released from the posterior pituitary gland that causes the milk ejection reflex (let-down). It's crucial for milk delivery to the offspring.

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Milk Fat Globule

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Milk fat globules are droplets of fat in milk surrounded by a membrane derived from the mammary gland cell. They deliver energy and nutrients to the infant.

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Lactose Synthase

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Lactose synthase is an enzyme involved in the synthesis of lactose, the main sugar in milk. It's essential for providing energy to the nursing infant.

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Myoepithelial Cells

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Myoepithelial cells are contractile cells that surround the alveoli and ducts of the mammary gland. They contract under the influence of oxytocin to aid milk ejection.

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