| 释义 |
blastocystenUK
blas·to·cyst B0315200 (blăs′tə-sĭst′)n. The modified blastula that is characteristic of placental mammals. Also called blastodermic vesicle.
blas′to·cys′tic adj.blastocyst (ˈblæstəʊˌsɪst) n1. (Biology) Also called: blastosphere the blastula of mammals: a sphere of cells (trophoblast) enclosing an inner mass of cells and a fluid-filled cavity (blastocoel)2. (Biology) another name for germinal vesicleblas•to•cyst (ˈblæs tə sɪst)
n. the blastula of the mammalian embryo consisting of an inner cell mass, a cavity, and the trophoblast. [1885–90] blastocyst(or blastula) A hollow ball of cells formed from a morula about five days after fertilization.Thesaurus| Noun | 1. | blastocyst - the blastula of a placental mammal in which some differentiation of cells has occurredblastodermic vessicleblastosphere, blastula - early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs |
TranslationsBlastocystenUK
blastocyst[′blas·tə‚sist] (embryology) A modified blastula characteristic of placental mammals. Blastocyst blastodermic sac, a stage in the development of mammal embryos, including humans, that arises as a result of cleavage of the fertilized ovum. The blastocyst is a hollow sac. An aggregate of cells—a node, analogous to the blastula of other animals—is found on one side of it. The outer wall of the blastocyst forms the trophoblast. blastocystenUK
blastocyst [blas´to-sist] the mammalian conceptus in the post-morula stage, consisting of the trophoblast and an inner cell mass. Early blastocyst. From Dorland's, 2000.blas·to·cyst (blas'tō-sist), The modified blastula stage of mammalian embryos, consisting of the embryoblast or inner cell mass and a thin trophoblast layer enclosing the blastocystic cavity or blastocele. Synonym(s): blastodermic vesicle [blasto- + G. kystis, bladder] blastocyst (blăs′tə-sĭst′)n. The modified blastula that is characteristic of placental mammals. Also called blastodermic vesicle.
blas′to·cys′tic adj.blastocyst A pre-implantation embryo consisting of a thin-walled hollow sphere of 16–40 cells, which appears in early mammalian development, the wall of which is the trophoblast. The embryo proper corresponds to a mass of cells at one side, which is equivalent to the blastula.blas·to·cyst (blas'tō-sist) The modified blastula stage of mammalian embryos (including human), consisting of the embryoblast (inner cell mass) and a thin trophoblast layer enclosing the blastocystic cavity.
Synonym(s): blastodermic vesicle. [blasto- + G. kystis, bladder]blastocyst The state of the development of the embryo at about eight days after fertilization, when implantation in the wall of the womb occurs. At this stage it consists of a double-layered sphere full of fluid. The outer layer, the trophoblast, forms the placenta, the inner layer forms the future fetus.blastocyst the BLASTULA of mammals, differing from that of lower vertebrates in consisting of an outer wall of cells, the TROPHOBLAST, by which the embryo implants in the uterus, and in having an inner cell mass, the embryonic disc, from which the embryo is formed.BlastocystA cluster of cells representing multiple cell divisions that have occurred in the fallopian tube after successful fertilization of an ovum by a sperm. This is the developmental form which must leave the fallopian tube, enter the uterus, and implant itself in the uterus to achieve actual pregnancy.Mentioned in: InfertilityblastocystenUK
Related to blastocyst: blastocyst transferSynonyms for blastocystnoun the blastula of a placental mammal in which some differentiation of cells has occurredSynonymsRelated Words |