from The Century Dictionary.
- noun In biology, the internal blastema or substance of the endoderm: same as
from the GNU version of the Collaborative International Dictionary of English.
- noun (Biol.) Entoblast; endoplast. See
from Wiktionary, Creative Commons Attribution/Share-Alike License.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the inner germ layer that develops into the lining of the digestive and respiratory systems
Sorry, no etymologies found.
B longitudinal section through the axis, g primitive-gut cavity, a primitive mouth-aperture, i inner cell-layer (entoderm, endoblast, gut-layer), e external cell-layer (outer germinal layer, ectoderm, ectoblast, or skin-layer).
But in all other animals the ovum first grows into two primary layers, the outer or animal layer (the ectoderm, epiblast, or ectoblast), and the inner or vegetal layer (the entoderm, hypoblast, or endoblast); and from these the tissues and organs are formed.
The former is often also called the ectoblast, or epiblast, and the latter the endoblast, or hypoblast.
The biologist could scarcely repress a burst of triumph as he perceived the germ gradually unfolding all the mysterious processes of mesoblast, ectoblast, and endoblast, which pertain to the earliest history of an arthropod.