Vitelline membrane - Wikipedia
网页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 Membrane - an overview | ScienceDirect Topics
网页The vitelline membrane is the transparent casing that encloses the yolk of the hen’s egg and separates it from the albumen. It consists of two major layers, the inner layer, which is laid down in the ovary, and the outer layer, which is secreted in the oviduct.
Vitelline membrane | biology | Britannica
网页The vitelline membrane is the only membrane in the eggs of various invertebrates—ctenophores, many worms, and echinoderms—and of certain lower chordates. All higher vertebrates and many invertebrates have one or …
Zona pellucida - Embryology
网页2024年10月6日 · Note that depending upon species and type of study, the zona pellucida can also be called the: oolemma, egg coat or vitelline membrane. The zona pellucid has many different roles including in oocyte development, protection during growth and transport, fertilization , spermatozoa binding, preventing polyspermy , blastocyst development, and ...
Characterization of structure and protein of vitelline membranes …
网页2020年1月30日 · The vitelline membrane (VM) is a multilayered structure that protects and gives shape to the egg yolk and separates it from the egg white. Together with the chalaza, VM keeps the egg yolk in the central part of the egg, thereby preventing its integration with the shell membranes.
Anatomy of an Egg - Exploratorium
网页Vitelline Membrane. The clear casing that encloses the yolk. Yolk. The yolk contains less water and more protein than the white, some fat, and most of the vitamins and minerals of the egg. These include iron, vitamin A, vitamin D, phosphorus, calcium, thiamine, and riboflavin. The yolk is also a source of lecithin, an effective emulsifier.
Structural and proteomic analyses of vitelline membrane
网页2020年11月9日 · In this study, we aimed to perform structural and proteomic analysis of the vitelline membrane (VM) of two species birds belonging to the family Turdidae: blackbird (Turdus merula) and song...
Vitelline Membrane - an overview | ScienceDirect Topics
网页The vitelline membrane is the transparent casing that encloses the yolk of the hen’s egg and separates it from the albumen. From: Atlas of Chick Development (Third Edition), 2014
Egg | Biology, Anatomy & Function | Britannica - Encyclopedia Britannica
网页2024年8月26日 · The vitelline membrane is the only membrane in the eggs of various invertebrates—ctenophores, many worms, and echinoderms—and of certain lower chordates. All higher vertebrates and many invertebrates have one or …
Fertilization - Egg Activation, Sperm Fusion, Zygote | Britannica
网页2024年9月16日 · An immediate response to fertilization is the raising of a membrane, called a vitelline membrane, from the egg surface. In the beginning the membrane is very thin; soon, however, it thickens, develops a well-organized molecular structure, and is called the fertilization membrane.