yolk bag

yolk bag
желточный мешок

English-russian biological dictionary. 2013.

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  • yolk — 1. n. 1 the yellow internal part of an egg that nourishes the young before it hatches. 2 Biol. the corresponding part of any animal ovum. Phrases and idioms: yolk bag (or sac) a membrane enclosing the yolk of an egg. Derivatives: yolked adj.… …   Useful english dictionary

  • Lorenz Oken — (August 1, 1779 – August 11, 1851) was a German naturalist. Lorenz Oken Oken was born Lorenz Okenfuss in Bohlsbach (now part of Offenburg) in Baden and studied natural history and medicine at the universities of Freiburg and Würzburg. He went on… …   Wikipedia

  • cic|a|tri|cle — «SIHK uh TRIHK uhl», noun. 1. Botany. a) a small cicatrix. b) the mark of attachment of leaves to branches. 2. the round, white spot on the surface of the yolk bag of a bird s egg, consisting of the germinal vesicle. ╂[< Latin cicātrīcula… …   Useful english dictionary

  • animal development — Introduction  the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …   Universalium

  • human embryology — ▪ biology Introduction       the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth.       The human body, like that of most animals, develops from a single cell produced by the union of… …   Universalium

  • sac — 1. A pouch or bursa. SYN: saccus [TA]. SEE ALSO: sacculus. 2. An encysted abscess at the root of a tooth. 3. The capsule of a tumor, or envelope of a cyst. [L. saccus, a …   Medical dictionary

  • arthropod — /ahr threuh pod /, n. 1. any invertebrate of the phylum Arthropoda, having a segmented body, jointed limbs, and usually a chitinous shell that undergoes moltings, including the insects, spiders and other arachnids, crustaceans, and myriapods. adj …   Universalium

  • Murray cod — Conservation status Critically Endangered  …   Wikipedia

  • Danish cuisine — Frikadeller (meat balls) with Rugbrød (rye bread) and sour cucumbers Danish cuisine (Danish: Dansk køkken) is shaped by the practice of fishing and farming, including the cultivation of the soil for raising crops and the raisin …   Wikipedia

  • Cephalopod — Cephalopods Temporal range: Devonian – Recent[1] (Stem groups from Cambrian)[2] …   Wikipedia

  • reproductive behaviour — In animals, any activity directed toward perpetuation of a species. Sexual reproduction, the most common mode, occurs when a female s egg is fertilized by a male s sperm. The resulting unique combination of genes produces genetic variety that… …   Universalium

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