Describe in brief the structure and function of placenta.


Placenta refers to the temporary vascular organ found in mammals, which attaches the fetus to the uterus of the mother during pregnancy.


The placenta is defined as an organ that develops during pregnancy in mammals. The placenta provides oxygen and nutrients to the growing fetus in the uterus of the mother.

Characteristics of placenta

  • The placenta in mammals is divided into two types, namely the yolk sac placenta and chorioallantoic placenta.
  • The placenta is disk-shaped and measures up to 22 cm in length.
  • The placenta is also rich in blood vessels.
  • The placenta is formed by chorion and the uterine tissue.

Functions of placenta

  • The placenta is the passage that unites the fetus to the mother.
  • Transmission of nutrients and oxygen from mother to the fetus and the release of carbon dioxide
  • The waste materials from the fetus is excreted through the placenta.


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