Question

what is the function of placenta ?

Answer 1

Function: Provide oxygen and nutrients to the fetus while removing carbon dioxide and  waste products.

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Answer 2

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$\purple{ \bf{Here \: is \: the \: answer \: !! }}$

$\large{ \blue{ \bf{Functions \: of \: PLACENTA \: : }}}$

✔The placenta faciliates the supply of oxygen and nutrients to the embryo and also removal of carbon dioxide and excretory (waste) materials produced by the embryo.

✔The placenta is connected to the embryo through an umbilical cord which helps in transport of substances to and from the embryo.

✔ Progesterone secreted by the placenta is essential for the maintenance of pregnancy after the 4th month (when the corpus luteum degenerates).

✔ Oestrogens (mainly estradiol) produced by the placenta reach Maternal blood and promote uterine growth and development of the mammary glands.

✔Human chorionic gonadotropin (hCG) produced by the placenta is similar in it's actions to the luteinizing hormone.

✔ Human chorionic gonadotropin sends the message of pregnancy to the Master Endocrine System so that LH is secreted to maintain corpus luteum and prevent menstruation and further ovulation.

✔ Gonadotropins are excreted through maternal uterine where their presence in urine is used as a test to detect pregnancy in it's early stages.

✔Somatomammotropin , also called placental lactogen has an anti insulin effect on the mother leading to increased Plasma levels of glucose and amino acids in the maternal circulation. In this way , it increases the availability of these materials to the foetus.

✔The placenta protects the foetus from the relatively high blood pressure of the maternal circulation.

✔The foetal tissue having paternal chromosomal effect,acts as foreign structure (antigenic allograft) to the mother who produces antibodies.The foetus sustains such a rejection for about 38-40 weeks by producing certain immunosuppressant substances.

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