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प्रश्न
Describe in brief the structure of placenta
उत्तर
Placenta is a collective set of special tissues which is composed of maternal and fetal segment.
It is a temporary part in the uterus of the mother, which is delivered out of the body when baby is born.
Structure:
-Placenta is in the shape of a flat disc.
-It is developed from parts called as chorion and allantois.
-It is found attached to the wall of uterus and connected to the fetus via umbilical cord.
-It has tree like branches called villi and are connected at the point called cotyledons on mother's organ.
Functions:
-Primary role is to feed the fetus. It transmits the nutrition from mother's blood to the embryo.
-Excretion of unwanted stuff is carried out.
-It also acts as a protective membrane and provides immunity.
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