Chorion meaning

Chorion is the outermost membrane surrounding the embryo in most amniotes.


Chorion definitions

Word backwards noirohc
Part of speech noun
Syllabic division cho-ri-on
Plural The plural of the word chorion is chorions.
Total letters 7
Vogais (2) o,i
Consonants (4) c,h,r,n

Chorion is an essential component of the placenta, playing a crucial role in the development of the fetus during pregnancy. It is one of the extraembryonic membranes that surround the embryo and provides protection and support during gestation.

Chorion is formed from trophoblast cells and mesoderm, making it the outermost membrane surrounding the fetus. It helps in the exchange of gases, nutrients, and waste products between the mother and the developing embryo.

Structure of Chorion

The chorion is a thin, transparent membrane that surrounds the embryo and creates the outermost layer of the placenta. It consists of two layers - the outer trophoblastic layer and the inner mesodermal layer. The trophoblastic layer helps in implantation and later forms the fetal part of the placenta, while the mesodermal layer provides support and nourishment for the developing fetus.

Functions of Chorion

The chorion plays several vital roles during pregnancy. It acts as a barrier to protect the fetus from infections and external factors, while also facilitating the exchange of essential nutrients, oxygen, and waste products between the mother and the fetus. Additionally, it produces hormones essential for maintaining pregnancy and supporting fetal development.

Overall, the chorion is a crucial component of the placenta and plays a fundamental role in the development and well-being of the fetus during pregnancy. Its structure and functions are essential for ensuring a healthy and successful gestation.


Chorion Examples

  1. The chorion is the outermost membrane surrounding an embryo in the uterus.
  2. During pregnancy, the chorion helps form the placenta.
  3. Researchers are studying the chorion to better understand fetal development.
  4. Issues with the chorion can lead to complications during pregnancy.
  5. The chorion is composed of cells that play a role in nutrient exchange.
  6. Doctors may examine the chorion to diagnose certain genetic conditions.
  7. The chorion functions as a protective barrier for the developing fetus.
  8. In some species, the chorion is shed after the embryo hatches from its shell.
  9. Abnormalities in the chorion can impact the health of the developing baby.
  10. The chorion contains blood vessels that play a crucial role in fetal circulation.


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  • Updated 15/05/2024 - 21:57:32