- blastodermic layer
- germ l.
Medical dictionary. 2011.
blastodermic layer
Look at other dictionaries:
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
blastodermic ectoderm — the external layer of a blastula or blastodisc; called also primordial e … Medical dictionary
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
Rauber layer — the most external of the three layers of cells which form the blastodisc or embryonic disc in the young embryo; called also blastodermic ectoderm and primitive ectoderm … Medical dictionary
blastoderm — blastodermic, blastodermatic, adj. /blas teuh derrm /, n. Embryol. 1. the primitive layer of cells that results from the segmentation of the ovum. 2. the layer of cells forming the wall of the blastula, and in most vertebrates enclosing a cavity… … Universalium
Trophoblast — Blastocyst with an inner cell mass and trophoblast … Wikipedia
Endoderm — Organs derived from endoderm … Wikipedia
Blastocyst — A stage in the early embryonic development of mammals in which there is a hollow sphere with an outer layer of cells and inside the hollow sphere, there is a cluster of cells called the inner cell mass. If development continues, the outer layer… … Medical dictionary
trophectoderm — Outermost layer of cells in the mammalian blastodermic vesicle, which will make contact with the endometrium and take part in establishing the embryo s means of receiving nutrition; the cell layer from which the trophoblast differentiates. [troph … Medical dictionary
Delamination — De*lam i*na tion, n. (Biol.) Formation and separation of lamin[ae] or layers; one of the methods by which the various blastodermic layers of the ovum are differentiated. [1913 Webster] Note: This process consists of a concentric splitting of the… … The Collaborative International Dictionary of English
