Chorioallantoic meaning

The term chorioallantoic refers to the placental membrane found in certain animals, such as birds and reptiles, during development.


Chorioallantoic definitions

Word backwards ciotnallaoirohc
Part of speech Chorioallantoic is an adjective.
Syllabic division cho-ri-o-al-lan-to-ic
Plural The plural of the word chorioallantoic is chorioallantoics.
Total letters 15
Vogais (3) o,i,a
Consonants (6) c,h,r,l,n,t

Chorioallantoic membranes play a crucial role in the development of eggs in avian species. This vital structure facilitates gas exchange, nutrient transfer, and waste removal during the incubation period. The chorioallantoic membrane is a highly vascularized structure that lines the inside of the eggshell and allows for the exchange of gases like oxygen and carbon dioxide with the developing embryo.

Structure and Function

The chorioallantoic membrane consists of two layers, the outer chorion, and the inner allantois, which work together to support the embryo's growth and development. The chorion is in direct contact with the eggshell and helps protect the embryo from physical damage and dehydration. The allantois, on the other hand, serves as a reservoir for metabolic waste and allows for gas exchange with the surrounding environment.

Developmental Significance

During the incubation period, the chorioallantoic membrane undergoes significant changes to meet the growing embryo's metabolic demands. Blood vessels within the membrane expand and develop to ensure an adequate supply of nutrients and oxygen to the developing chick. This process is essential for the successful hatching of healthy offspring.

Role in Research

Chorioallantoic membranes have also been widely used in scientific research, particularly in the field of embryology and pharmacology. The membrane's thin and transparent nature allows for easy observation of blood vessel development and responses to various stimuli. Researchers can study the effects of drugs, toxins, and growth factors on blood vessel formation using the chorioallantoic membrane as a model system.

In conclusion, the chorioallantoic membrane is a critical structure in avian embryonic development, providing essential functions for gas exchange, nutrient transfer, and waste removal. Its intricate structure and physiological significance make it a valuable model system for studying various biological processes and advancing our understanding of embryonic development and vascular biology.


Chorioallantoic Examples

  1. The chorioallantoic membrane is an essential structure for the exchange of gases in bird embryos.
  2. Scientists use the chorioallantoic membrane of chicken eggs to study the effects of new drugs.
  3. A clear visualization of blood vessels can be observed on the chorioallantoic membrane of chicken embryos.
  4. The chorioallantoic membrane develops during the growth of the embryo in birds.
  5. Researchers often use the chorioallantoic membrane model to study angiogenesis in cancer.
  6. The chorioallantoic membrane provides nutrients and oxygen to the developing embryo in avian species.
  7. In ovo vaccination involves injecting vaccines directly into the chorioallantoic cavity of an embryo.
  8. The study of chorioallantoic development can provide insights into the evolution of vertebrate reproductive structures.
  9. Damage to the chorioallantoic membrane can result in poor embryonic development in avian species.
  10. The chorioallantoic membrane is a key anatomical feature that distinguishes birds from other vertebrates.


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  • Updated 02/07/2024 - 05:12:01