Question

Short / Long Answer question Type :
Write short notes on Placenta

Answer 1

• The placenta is an ephemeral organ found only in eutherian mammals during gestation.
  
• The placenta is the only organ composed of cells derived from two different organisms i.e. from the fetus and the mother.
• The fetal membranes are chorion and amnion.
• The membranes from the uterine wall are deciduas basalis. It is the portion of the deciduas which is directly adjacent to conception at the implantation site.
• Decidua is a mucous membrane lining the uterus during pregnancy and it cast off during childbirth. After the implantation of the embryo, the uterine endometrium is called decidua.
• Placenta weight is around 600 gm when fully formed, measures 20 cm in diameter and 3 cm thick at the center.
• The placenta supplies oxygen and nutrients to the embryo and also removes carbon dioxide and excretory/waste materials produced by the embryo.