Question

Fill in the blanks.
The structure which provides a vascular connection between foetus and uterus is called_______.

Answer 1

Hint: The fusion of male and female gamete is called fertilization and it produces zygote. The zygote divides and develops into an embryo. When the embryo develops further, it produces foetus. A foetus is an unborn offspring developing inside the womb within the body of a female.

Complete answer:
The fertilization of ovum takes place in the fallopian tube. The fertilized egg moves through the fallopian tube and reaches to the uterine wall or the lining of the uterus where it is implanted. After the 11 days of fertilization, the embryo gets embedded into the wall of the uterus. The place where the embryo or blastocyst gets attached to the wall of the uterus, a pouch-like structure is developed that is filled with water. It is called the womb.
The growing embryo is connected to the wall of the uterus with the help of a tube-like structure called an umbilical cord to the placenta. It provides oxygen and necessary nutrients to growing embryos or fetuses. It also removes out the waste product from the blood of the baby. It acts as a barrier and prevents various infections from the mother's body as it does not allow infectious agents to enter into the baby's body. Thus the structure, which provides a vascular connection between foetus and uterus, is called Placenta.

Note: The Placenta is an important organ that attaches the foetus to the mother's body. It provides oxygen, nutrition, protection through maternal immunity, and prevents infections transferred from the mother's body. After the birth of the baby, the placenta is also expelled out of the mother's body due to mild contractions. It is called the third stage of labour.