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单词 trophoblast
释义

Definition of trophoblast in English:

trophoblast

noun ˈtrɒfə(ʊ)blastˈtrəʊfə(ʊ)blastˈtrɑfəblæst
Embryology
  • A layer of tissue on the outside of a mammalian blastula, supplying the embryo with nourishment and later forming the major part of the placenta.

    Example sentencesExamples
    • A villus has a fibromuscular core with fetal blood vessels and is covered by an epithelium termed the trophoblast.
    • When the developing, fertilized egg at the ‘blastocyst’ stage becomes implanted in the lining of the uterus, it develops ‘villi’ - fine, frond-like cellular projections from its outermost layer, the trophoblast.
    • The placenta derives from embryonic cells called trophoblasts, which form a ball around the cells that ultimately develop into the fetus.
    • The trophoblast eventually forms the placenta, through which the embryo proper receives dissolved nutrients and is cleansed of waste.
    • The surface of the sphere is made up of a layer of specialized cells called the trophoblast.

Derivatives

  • trophoblastic

  • adjective
    Embryology
    • The vascular endothelium was destroyed by villous proliferation and trophoblastic invasion in this vessel.
      Example sentencesExamples
      • Nevertheless, one version of this suggestion, the ovarian time bomb hypothesis, explicitly envisages an individual-level cost of parthenogenesis, namely ovarian trophoblastic disease.
      • Young women may very rarely develop a malignant trophoblastic tumor, presumably derived from ectopic germ cell tissue.
      • Multiple gestation, gestational trophoblastic disease, triploidy, trisomy 21 syndrome, and hydrops fetalis have been associated with an increased incidence of hyperemesis gravidarum.
      • We selected principally trophoblastic placental tissue with no signs of calcification, avoiding the decidua basalis and corionic plate.
 
 

Definition of trophoblast in US English:

trophoblast

nounˈträfəblastˈtrɑfəblæst
Embryology
  • A layer of tissue on the outside of a mammalian blastula, supplying the embryo with nourishment and later forming the major part of the placenta.

    Example sentencesExamples
    • A villus has a fibromuscular core with fetal blood vessels and is covered by an epithelium termed the trophoblast.
    • The surface of the sphere is made up of a layer of specialized cells called the trophoblast.
    • The trophoblast eventually forms the placenta, through which the embryo proper receives dissolved nutrients and is cleansed of waste.
    • When the developing, fertilized egg at the ‘blastocyst’ stage becomes implanted in the lining of the uterus, it develops ‘villi’ - fine, frond-like cellular projections from its outermost layer, the trophoblast.
    • The placenta derives from embryonic cells called trophoblasts, which form a ball around the cells that ultimately develop into the fetus.
 
 
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更新时间:2024/12/23 18:24:44