Biology, asked by Anonymous, 4 months ago

explain parturitian and lactation.....
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Answers

Answered by riya15042006
2

Answer:

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Explanation:

PARTURITION - DEFINITION

When the process of gestation is completed by the embryo which is about 280 days its time for process of birth of the baby.

At the time of birth there are powerful contractions of the muscles of the uterus and the baby arrives with the head first out.

After the birth of the infant the blood vessels in the umbilical cord shrink. They are tied in a knot and cut. After a while, the placenta breaks from the uterus and is expelled out.

The uterus regains its normal shape after some days.

LACTATION - DEFINITION

Production of milk in the mammary gland is called lactation.

Secretion and storage of milk is carried out under the influence of prolactin.

Ejection of milk is stimulated by oxytocin.

The first milk which comes from the mammary glands of the mother just after the child birth is called colostrum.

The main constituents of human milk are fat, caesin, lactose, mineral salts and vitamins.

Answered by AashutoshKrMondal
1

Answer:

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Explanation:

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