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Sagot :
"The placenta is a temporary organ that is the site of exchange of oxygen, nutrients, and wastes between the mother and fetus, and the umbilical cord connects the placenta to the embryo."
The term "placenta" refers to the transient vascular organ that is present in mammals and holds the baby to the mother's uterus during pregnancy. A developing newborn receives oxygen and nutrients from this structure. It also cleans the baby's blood of waste materials. Only mammals have a placenta.
The transmission of materials is facilitated by the umbilical cord, which joins the fetus and placenta. The network of blood veins in the uterine wall connects the mother to the placenta. The umbilical cord has a vein and two arteries. It transports waste materials away from the fetus and supplies it with oxygen and nutrition.
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