embryonic layer
Look at other dictionaries:
Embryonic stem cell — Embryonic stem cells (ES cells) are stem cells derived from the inner cell mass of an early stage embryo known as a blastocyst. Human embryos reach the blastocyst stage 4 5 days post fertilization, at which time they consist of 50 150 cells.… … Wikipedia
Embryonic disk — Infobox Embryology Name = PAGENAME Latin = GraySubject = 6 GrayPage = 47 Caption = Section through embryonic disk of Vespertilio murinus. Caption2 = Surface view of embryo of a rabbit. (After Kölliker.) arg. Embryonic disk. pr. Primitive streak.… … Wikipedia
layer — A sheet of one substance lying on another and distinguished from it by a difference in texture or color or by not being continuous with it. SEE ALSO: stratum, lamina. SYN: panniculus. ameloblastic l. the internal l. of the enamel organ. SYN: enam … Medical dictionary
embryonic tissue — noun tissue in an embryo • Hypernyms: ↑animal tissue • Hyponyms: ↑germ layer … Useful english dictionary
Extra-embryonic coelom — Extraembryonic coelom The extraembryonic coelom (or chorionic cavity) is shown between the two layers of extraembryonic mesoderm (labelled mes. ) in this image of an implanted embryo. Latin coeloma extraembryonicum … Wikipedia
Science and Ethics of Embryonic Stem Cell Research — ▪ 2000 by Lori P. Knowles and Eric Parens At the end of 1998, almost simultaneously, one team of researchers announced that it had isolated human embryonic stem (ES) cells and another announced that it had isolated human embryonic germ (EG) … Universalium
germ layer — n any of the three primary layers of cells differentiated in most embryos during and immediately following gastrulation * * * any of the three distinct types of tissue found in the very early stages of embryonic development (see ectoderm,… … Medical dictionary
Germ layer — [ http://www.ncbi.nih.gov/About/primer/genetics cell.html NCBI] .] A germ layer is a collection of cells, formed during animal embryogenesis. Germ layers are particularly pronounced in the vertebrates; however, all animals more complex than… … Wikipedia
germ layer — any of the three distinct types of tissue found in the very early stages of embryonic development (see ectoderm, endoderm, mesoderm). The germ layers can be traced throughout embryonic development as they differentiate to form the entire range of … The new mediacal dictionary
germ layer — one of the three primary embryonic cell layers. Cf. ectoderm, endoderm, mesoderm. [1875 80] * * * … Universalium
