Biology
Answer
The placenta is formed of two sets of finger-like projections, the villi. One set is given out by uterine wall and the other set by allantois from the embryo. These two set of villi are interlocked. The impurities excreted by foetus are exchanged by their capillaries to the capillaries of uterine wall (mother).
Related Questions
Name the following :
(i) Three accessory glands of human male reproductive system.
(ii) Two hormones secreted from placenta.
(iii) Two types of twins.
(iv) Two layers of the wall of uterus.
List the substances which the foetus receives from the mother through placenta.
Write one sentence each using the following terms pertaining to reproduction in humans.
(i) Gestation
(ii) 280 days
(iii) Head first
(iv) Placenta
(v) After-birth
(vi) Tied and cut
Does the foetus inside the mother's uterus breathe? Yes/No