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In reptiles, birds, and monotremes, the chorion is one of the four extraembryonic membranes that make up the amniotic egg that provide for the nutrients and protection needed for the embryo's survival. It is located inside the albumen, which is the white of the egg. It encloses the embryo and the rest of the embryonic system.
The contents of a chicken egg with chalaza clearly visible. In the eggs of most birds (not of the reptiles [1]), the chalazae are two spiral bands of tissue that suspend the yolk in the center of the white (the albumen). The function of the chalazae is to hold the yolk in place.
The chorioallantoic membrane (CAM), also known as the chorioallantois, is a highly vascularized membrane found in the eggs of certain amniotes like birds and reptiles.It is formed by the fusion of the mesodermal layers of two extra-embryonic membranes – the chorion and the allantois. [1]
This chicken egg has been soaked in vinegar for a few days and has become translucent and flexible. Anatomy of a chicken egg. The bird egg is a fertilized gamete (or, in the case of some birds, such as chickens, possibly unfertilized) located on the yolk surface and surrounded by albumen, or egg white. The albumen in turn is surrounded by two ...
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Image:Ei1.jpg ; corrected : Image:Anatomy of an amiotic egg.svg ; image:Anatomy of an egg Ar.svg Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover ...
The file "Anatomy_of_an_egg" is corrected : the orientation is good now. It's the correction of the file on commons. Deutsch: Schematischer Längsschnitt eines Hühnereis: 1. Kalkschale 2. Schalenhaut 3. Schalenhaut 4. Chalaza (Hagelschnur)
In the chicken egg, the yolk is separated from the albumen by the vitelline membrane which acts as a barrier to microbial infection. [7] Apart from the 13 proteins identified [ 4 ] to make up the membrane, the proteins that are key to providing antimicrobial properties to the membrane are the vitelline outer membrane proteins (VMO) 1 [ 8 ] and ...