(a) What is the life support system of a fetus?
(b) How long does a human baby take to develop before birth?
(c) What is the name of the narrow opening between the uterus and the vagina.
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Explanation:
The placenta is an organ that develops in the mother's uterus during pregnancy. ... It is the baby's life support system and breathing organ while in the womb. The placenta allows oxygen and nutrients to move from the mothers blood to the fetus' blood. However, the two blood circulation systems are kept separate
9months
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