a) Give reason
i. Placenta is extremely essential for foetal development.
ii. Blocking of Vas deferens prevents pregnancy
iii. Blocking of fallopian tube prevents pregnancy
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I. placenta is the tissue which provides nutrients to the embryo from the mother's body therefore it is very essential.
ii. blocking of vas differs prevent the flow of sperms from testis therefore it will prevent pregnancy as it is site for Sperm.
iii. blocking of fallopian tube will provide the transfer of ovum to oviduct where the sperm can't meet the egg fertilization will not take place and pregnancy will not occur.
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