trophoblast

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Related to Trophoblasts: cytotrophoblast, trophoblast layer

trophoblast

 [trof´o-blast]
the peripheral cells of the blastocyst, which attach the zygote (fertilized ovum) to the uterine wall and become the placenta and the membranes that nourish and protect the developing organism. The inner cellular layer is the cytotrophoblast and the outer layer is the syntrophoblast.
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.
Synonym(s): chorionic ectoderm
[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.
Mentioned in: Choriocarcinoma
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
References in periodicals archive ?
Studying development and functions of trophoblastic cells is critical; therefore, in vitro models for culturing primary trophoblast cells are essential.
Intermediate trophoblasts are located in the villi, the implantation site, and the chorionic sac.
Apart from this, in three biopsies, there were acute atherosis, in another one there was increased extravillous trophoblasts, and in another one there were both acute atherosis and increased extravillous trophoblasts (Figures 1, 2, and 3).
The layer between 45% and 35% Percoll contained the trophoblast cells; this was collected, suspended in DMEM, and centrifuged at 1200 rpm at room temperature for 10 min.
Placental site trophoblastic tumor is a malignant proliferation of intermediate trophoblasts at placental implantation site.
The blastocyst is surrounded by trophoblast and thus everything will tend to the formation of chorionic villi; however, the trophoblast from which the implantation began can grow further, causing greater branching of its chorionic villi.
As shown in [Figure 1]b, MMP2 protein was identified to be immunolocalized in syncytiotrophoblast and extravillous trophoblast cells.
Powell, "Adiponectin inhibits insulin function in primary trophoblasts by PPAR[alpha]-mediated ceramide synthesis," Molecular Endocrinology, vol.
Loke, "Early human decidual cells exhibit NK activity against the K562 cell line but not against first trimester trophoblast," Cellular Immunology, vol.
It is proposed that these changes to gene expression in placental trophoblasts in response to E.
Lv, "Decreased expression of matrix metalloproteinase-1 in the maternal umbilical serum, trophoblasts and decidua leads to preeclampsia," Experimental and Therapeutic Medicine, vol.