trophoblast
[trof´o-blast] Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
troph·o·blast
(trof'ō-blast, trō'fō-blast), The mesectodermal cell layer covering the blastocyst that erodes the uterine mucosa and through which the embryo receives nourishment from the mother; the cells do not enter into the formation of the embryo itself but contribute to formation of the placenta. The trophoblast develops processes that later receive a core of vascular mesoderm and are then known as the chorionic villi; the trophoblast soon becomes two layered, differentiating into the syncytiotrophoblast, an outer layer consisting of a multinucleated protoplasmic mass (syncytium), and the cytotrophoblast, the inner layer next to the mesoderm in which the cells retain their membranes.
[tropho- + G. blastos, germ]
Farlex Partner Medical Dictionary © Farlex 2012
trophoblast
(trō′fə-blăst′)n. The outermost layer of cells of the mammalian blastocyst that attaches the fertilized ovum to the uterine wall and serves as a nutritive pathway for the embryo.
tro′pho·blas′tic adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
troph·o·blast
(trō'fō-blast) The mesectodermal cell layer covering the blastocyst, which erodes the uterine mucosa and through which the embryo receives nourishment from the mother; the cells do not enter into the formation of the embryo itself, but contribute to the formation of the placenta. The trophoblast develops processes that later receive a core of vascular mesoderm and are then known as the chorionic villi; the trophoblast soon becomes two-layered, differentiating into the syncytiotrophoblast, an outer layer consisting of a multinucleated protoplasmic mass (syncytium), and the cytotrophoblast, the inner layer next to the mesoderm in which the cells retain their membranes.
[tropho- + G. blastos, germ]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
trophoblast
The outer layer of the BLASTOCYST.Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
trophoblast
the outermost layer of cells surrounding the BLASTOCYST, consisting of embryonic epithelium, which subsequently encloses all the embryonic structures of the developing mammal and forms the outer layer of the CHORION and the embryonic side of the placenta.Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Trophoblast
The tissues that surround an embryo and attach it to the uterus.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
troph·o·blast
(trō'fō-blast) Mesectodermal cell layer covering the blastocyst that erodes uterine mucosa and through which embryo receives nourishment from mother.
[tropho- + G. blastos, germ]
Medical Dictionary for the Dental Professions © Farlex 2012