describe the role of the placenta in the nutrition of the developing embryo.
-on one side of the wall of the uterus there is a placenta.
-when the child is in the uterus it is in a water filled environment (amniotic fluid) the child cannot digest, breathe or excrete.
-growing out of the developing embryo there is a placental structure (umbilical cord)
-the blood vessels inside the placenta are the child's blood vessels (arteries and veins)
-the placenta grows into the wall of the uterus.
-the mother continues to eat during pregnancy and in the bloodstream of the mother there will be glucose, amino acids, fats- these will travel through her bloodstream and into the wall of the uterus- these molecules will cross into the child's blood into the placenta- which are then taken into the child.
-the placenta has a large surface area- barrier from mother and child's blood is very thin.
-the child also produces molecules that exchanges into the maternal blood like carbon dioxide and urea.
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