Search results
Results From The WOW.Com Content Network
Vitellin is a protein found in the egg yolk. It is a phosphoprotein. [1] Vitellin is a generic name for major of many yolk proteins. [2] Vitellin has been known since the 1900s. [3] The periodic acid-Schiff method and Sudan black B dye was used to help determine that Vitellin is a glycolipoprotein because it stained positive when tested.
They run upward at first in front, and subsequently on either side of the intestinal canal.They unite on the ventral aspect of the canal.. Beyond this, they are connected to one another by two anastomotic branches, one on the dorsal, and the other on the ventral aspect of the duodenal portion of the intestine.
The vitelline membrane or vitelline envelope is a structure surrounding the outer surface of the plasma membrane of an ovum (the oolemma) or, in some animals (e.g., birds), the extracellular yolk and the oolemma.
Vitelline arteries, arteries that bring blood to the yolk sac; Vitelline circulation, the system of blood flowing between an embryo and its yolk sac; Vitelline cyst, a developmental defect relating to the closure of the vitelline duct
In the human embryo, the vitelline duct, also known as the vitellointestinal duct, [1] the yolk stalk, [1] the omphaloenteric duct, [1] or the omphalomesenteric duct, [1] is a long narrow tube that joins the yolk sac to the midgut lumen of the developing fetus. [2]
Human embryo of 2.6 mm. Diagram of the vascular channels in a human embryo of the second week. (After Eternod.) The red lines are the dorsal aortae continued into the umbilical arteries.
The vitelline arteries are the arterial counterpart to the vitelline veins.Like the veins, they play an important role in the vitelline circulation of blood to and from the yolk sac of a fetus.
Vitellogenin provides the major egg yolk protein that is a source of nutrients during early development of egg-laying vertebrates and invertebrates.Although vitellogenin also carries some lipid for deposition in the yolk, the primary mechanism for deposition of yolk lipid is instead via VLDLs, at least in birds and reptiles. [4]