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Question : Howdoesdevelopingembryogetsitsnouroshmentinsidethe mother 'sbody? |
| Answer» Solution :The PLACENTA allows the EXCHANGE of food materials, diffusion of OXYGEN, excretion of nitrogenous wastes and elimination of carbon-di-oxide. A cord, CONTAINING BLOOD vessels tha connects the placenta with the foetus is called the umbilical cord. | |