It can be attached to the umbilical region by the
vitelline ligament, with the possibility of
vitelline cysts, or even a patent
vitelline canal forming a
vitelline fistula when the umbilical cord is cut.
The differences in the structure of the cyst wall, the site of infection, the form of excretory bladder in metacercarie, the numbers of digitiform pockets in the gonotyle and number of
vitelline follicles in adults may be due to geographic and interspecific variations.
Regarding the high variation of the morphometric characteristics, Khalil and Abdul-Salam (1988) selected as the most important characteristics to the diagnosis of Encotyllabe species the following features: body shape, relative size of several organs (pharynx, testes, ovary,
vitelline reservoir, and penis), relative position of the testes, penis shape, extension of the vitellaria and size and shape of the anchors.
Identification of a new sea urchin
vitelline envelope sperm binding glycoprotein.
Characterization of the acro-some reaction-inducing substance in Xenopus (ARISX) secreted from the oviductal pars recta onto the
vitelline envelope.
Flattening of the yolk is primarily due to the water content increase caused by osmotic migration from the albumen through the
vitelline membrane [5].
KEY WORDS: abalone, Haliotis asinina, egg jelly coat,
vitelline envelope, acrosome reaction, motility
Rappelons que, pendant la vitellogenese, le corps gras synthetise un precurseur de la
vitelline (principale proteine du vitellus des oeufs des insectes), la vitellogenine: celle-ci est secretee dans l'hemolymphe et absorbe par les ovocytes en cours du developpement.
This plexus comprises three cross-anastomoses between the left and the right
vitelline veins--the superior anastomosis within the liver, the middle anastomosis posterior to the duodenum, and the inferior anastomosis that lies preduodenal.
Vitelline block Biochemical changes in the oocyte that prevent more than one sperm from binding to the
vitelline (oocyte) membrane.
Once the spheres are internalized, they coalesce with others to form
vitelline platelets.
To attend the fad acid requirement, after the
vitelline sac absorption, it can probably be one of the explanations of the increase of the FI following the increase of the oil inclusion.
