chorioallantois
Noun: 1. A fetal membrane in birds and most reptiles: The chorioallantois is a highly vascularized (rich in blood vessels) extraembryonic membrane formed by the fusion of the chorion and the wall of the allantois. It serves critical functions in gas exchange (respiration) and waste storage for the developing embryo.
The term "chorioallantois" is a specialized biological term used primarily in embryology and developmental biology. * It is used to describe a specific anatomical structure in egg-laying amniotes (birds and reptiles). * It is often discussed in the context of embryonic development, respiration, and experimental embryology.
- In avian development, the chorioallantois functions as a respiratory organ.
- Researchers inoculated the virus onto the chorioallantois of chicken eggs to culture it.
- The formation of the chorioallantois is a key event in the adaptation of embryos to terrestrial life.
- Chorioallantoic membrane (CAM): This is the full term often used interchangeably with "chorioallantois," emphasizing its membranous structure. The CAM is a common model system in biological research.
- The chorioallantoic membrane assay is used to study angiogenesis (blood vessel formation).
- Chorioallantoic (adjective): Of or relating to the chorioallantois.
- The chorioallantoic circulation is essential for transporting gases.
- Chorion (noun): The outermost extraembryonic membrane.
- Allantois (noun): An extraembryonic membrane involved in waste storage and gas exchange.
- Chorioallantoic membrane (CAM): The most direct synonym, specifying the structure is a membrane.
The "chorioallantois" refers specifically to the fused structure of two distinct membranes (chorion + allantois). It is not found in placental mammals in the same form; instead, a similar but more complex structure, the chorioallantoic placenta, forms for maternal-fetal exchange.
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the very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois
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