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blastocyst 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈblastəˌsist/,
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blastocysts, plural;
  1. A mammalian blastula in which some differentiation of cells has occurred

  1. the blastula of a placental mammal in which some differentiation of cells has occurred
  2. The blastocyst is a structure formed in the early embryogenesis of mammals, after the formation of the morula. It is a specifically mammalian example of a blastula. ...
  3. (Blastocysts) In mammals, the embryo at the 16-cell stage of development through the 64-cell satge when the embryo implants.
  4. A preimplantation embryo of about 150 cells produced by cell division following fertilization. The blastocyst is a sphere made up of an outer layer of cells (the trophoblast), a fluid-filled cavity (the blastocoel), and a cluster of cells on the interior (the inner cell mass).
  5. A very early embryo consisting of about 150-300 cells. A blastocyst may or may not implant into the uterus.
  6. Multicellular embryo that is seen five to six days after fertilization.
  7. The modified blastula stage of embryos, consisting of the inner cell mass and a thin trophoblast layer enclosing the blastocoele.
  8. After a mammalian ovum is fertilised it begins to divide. The blastocyst is an early stage of this process which consists of a sphere that is fluid-filled and surrounded by a layer of cells, surrounding a fluid-filled cavity. There is a mass of cells at one side which will become the embryo. ...
  9. An early stage in development of an embryo, when the cells are not yet differentiated into organs.
  10. The mammalian conceptus in the post-morula stage. It has a fluid filled cavity known as blastoceole and is not limited to one germ layer.
  11. The four-to-nine day-old embryo (post-fertilization) which consists of 100-200 total cells and is approximately 1/10 of a millimeter in diameter (roughly the size of a period at the end of this sentence). This stage of development is prior to implantation in the uterus. ...
  12. A preimplantation embryo that contains a fluid-filled cavity called a blastocoel.
  13. An embryo which has developed to a hollow ball of approximately 60-100 cells after 5 days in culture.
  14. An early stage of human development, comprising 50 to 100 cells; the structure found in early pregnancy before implantation.
  15. A very early embryo consisting of approximately 150-300 cells. The blastocyst is a spherical cell mass produced by cleavage of the zygote (fertilized egg) after approximately 5-7 days of cell divisions. ...
  16. A preimplantation embryo of about 150 cells produced by cell division (mitosis) following fertilization. ...
  17. An early stage of embryo development made up of a hollow sphere and an inner cell mass.
  18. a thin-walled hollow structure in early embryonic development that contains a cluster of cells. It is preceded by a zygote, the fertilized egg cell, and succeeded by an embryo.
  19. An embryonic stage in mammals; a hollow ball of cells produced one week after fertilization in humans.
  20. (also blastocist)  A mammalian embryo (fertilized ovum) in the early stages of development, approximately up to the time of implantation. It consists of a hollow ball of cells.
  21. early stage in embryonic development (5-7 days after fertilization) before implantation; consists of outer trophoblast and inner stem cell mass.
  22. An embryo reaches the blastocyst stage about five days after egg  collection. Some doctors do what is called blastocyst transfers rather than the more usual earlier transfer after 2 or 3 days following egg collection.
  23. One of the earliest stages of an embryo.
  24. A cluster of cells representing multiple cell divisions that have occurred in the fallopian tube after successful fertilization of an ovum by a sperm.
  25. An embryo with a fluid-filled blastocele cavity (usually developing by 5 or 6 days after fertilization).