- yolk plug
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The large edible endothermal cells surrounded by the blastopore of an amphibian gastrula during its later stages
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yolk plug
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yolk plug — n a mass of yolk cells found in the blastopore of the embryos of some vertebrates * * * the mass of yolk cells protruding from the blastopore of amphibians at the end of gastrulation … Medical dictionary
Yolk plug — is the remaining patch of endodermal cells that is created during the formation of the ventral lip of the blastopore. It is a patch of large endodermal cells which remains exposed on the vegetal surface of the amphibian blastula that will… … Wikipedia
yolk plug — yolk within the blastopore … Dictionary of ichthyology
yolk plug — noun : a pluglike mass of yolk cells found in the blastopore of the embryos of some vertebrates … Useful english dictionary
reproductive system, animal — Introduction any of the organ systems by which animals reproduce. The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… … Universalium
List of Æon Flux episodes — This is a list of all Æon Flux episodes. Contents 1 Season 1 (1991) 1.1 Pilot (September 1991) 1.2 Notes 2 Season 2 (1992) … Wikipedia
Denmark — This article is about the country. For other uses, see Denmark (disambiguation). Denmark Danmark … Wikipedia
reptile — reptilelike, adj. reptiloid /rep tl oyd /, adj. /rep til, tuyl/, n. 1. any cold blooded vertebrate of the class Reptilia, comprising the turtles, snakes, lizards, crocodilians, amphisbaenians, tuatara, and various extinct members including the… … Universalium
pregnancy — /preg neuhn see/, n., pl. pregnancies. the state, condition, or quality of being pregnant. [1520 30; PREGN(ANT) + ANCY] * * * Process of human gestation that takes place in the female s body as a fetus develops, from fertilization to birth (see… … Universalium
protein — proteinaceous /proh tee nay sheuhs, tee i nay /, proteinic, proteinous, adj. /proh teen, tee in/, n. 1. Biochem. any of numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the… … Universalium
