Trophoblasts (from Greek trephein: to feed, and blastos: germinator) are cells forming the outer layer of a blastocyst, which provide nutrients to the embryo and develop into a large part of the placenta. They are formed during the first stage of pregnancy and are the first cells to differentiate f...
Found on http://en.wikipedia.org/wiki/Trophoblast
[n] - the membrane that forms the wall of the blastocyst in early development
Found on http://www.webdictionary.co.uk/definition.php?query=trophoblast
Extra-embryonic layer of epithelium that forms around the mammalian blastocyst, and attaches the embryo to the uterus wall. Forms the outer layer of the chorion, and together with maternal tissue will form the placenta.
Found on http://www.encyclo.co.uk/visitor-contributions.php
<embryology> Extra embryonic layer of epithelium that forms around the mammalian blastocyst and attaches the embryo to the uterus wall. ... Forms the outer layer of the chorion and together with maternal tissue will form the placenta. ... (18 Nov 1997) ...
Found on http://www.mondofacto.com/facts/dictionary?trophoblast
noun the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall; `after implantation of the blastocyst in the uterine wall the trophoblast divides into two la...
Found on http://wordnetweb.princeton.edu/perl/webwn?s=trophoblast
(tro´fo-blast) the peripheral cells of the blastocyst, which attach the zygote 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.
Found on http://www.encyclo.co.uk/local/21001
(from the article `blastocyst`) The enveloping layer is now referred to as the trophoblast. It does not contribute directly to the formation of the embryo but rather serves to ... ...is propelled slowly down the oviduct by action of cilia in the oviduct lining. At the end of cleavage a solid ball of...
Found on http://www.britannica.com/eb/a-z/t/84
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