The placenta is made by finger-like projections called chorionic villi and therefore the uterine tissue. This layer plays a vital roles during pregnancy, which are briefly discussed as follows:-Providing nutrients and oxygen to the growing fetus.It also removes the waste materials given out by the fetus substituting the function of the gastrointestinal system and therefore the excretory system.The placenta releases hormones like human placental lactogen, progesterone, estrogen, human chorionic gonadotropin and relaxin which are necessary for the expansion of the fetus.The duct that connects the fetus to the placenta helps in the transportation of drugs required for growth from the mother to the fetus.