Throughout prenatal development, the placenta and umbilical blood vessels carry out the exchange of oxygen, nutrients, and waste products.
Prenatal development can be described as the process starting after the fertilization of an egg until the birth of the baby.
The prenatal period is divided into three main stages which are the germinal, embryonic, and fetal stages.
An umbilical cord is present in mammals which connects the placenta to the fetus. It is through the blood vessels of the umbilical cord that the fetus gets nutrients and oxygen. Also, waste products of the fetus are carried by the blood vessels of the umbilical cord.
We can say that the umbilical cord acts as the only connection between the placenta and the baby throughout the prenatal development phase.
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