Q10. Define is placenta and mention its functions.

A structural and functional unit between developing embryo (foetus) and maternal body called placenta.

Functions:
❖ Provides nutrients and oxygen to the developing embryo.
❖ Removes C02 and waste materials from the embryo.
❖ Acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progesterones that are essential to maintain pregnancy.