(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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Solution
(a) The placenta is the life support system of a foetus. (b) A human baby takes 9 months to develop before birth. (c) The cervix is the narrow opening between the uterus and the vagina.