Placenta is a temprorary endocrine structure i. e. formed between mother and the foetus .
The placenta has two component 1- a foetal portion formed by the chorionforandosom.
2-a meternal portion formed by the deciduabasalis .
The placenta connect to the body via the umbilical cord .
The human placenta is called chorioallantoic placenta because a large chorion is fused with the alontois .
The blood of the mother and the feotus do not mixed at all in the placenta or at any other place.
Function ; Placenta provides food and oxygen to the embryo .
It helps to removal of metabolic wastes such as carbon dioxide and urea from the foetal to maternal blood.
It provides immunity on the foetus against certain diseases , such as diptheria , smallpox and measles.
It stores fat , glycogen and iron for the embryos liver is formed .
Placenta acts as an endocrine gland and secret placental hormones i.e. estrogen progesterone CGH and placental lactogen
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