How does developing embryo gets its nouroshment inside the mother 's body ?

Explanation

(i) The developing embryo gets its nurishment inside the mother 's body with the help of placentia . It is a disc shaped structure attached to the uterine wall and in a temporary association between the developing embryo and maternal tissures .
(ii ) It allows the exchange food materials diffusion of oxygen , excretion of nitrogenous wastes and elimination of carbon dioxide .
(iii) A cord containing blood vessels that conncets the placenta with the foetus is called the umbilical cord .