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  2. Blastocyst - Wikipedia

    en.wikipedia.org/wiki/Blastocyst

    In humans, blastocyst formation begins about five days after fertilization when a fluid-filled cavity opens up in the morula, the early embryonic stage of a ball of 16 cells. The blastocyst has a diameter of about 0.1–0.2 mm and comprises 100-200 cells following 7-8 rounds of cleavage (cell division without cell

  3. Blastulation - Wikipedia

    en.wikipedia.org/wiki/Blastulation

    E-cadherin adhesion defines the apico-basal axis in the developing embryo and turns the embryo from an indistinct ball of cells to a more polarized phenotype which sets the stage for further development into a fully formed blastocyst. [16] Xenopus membrane polarity is established with the first cell cleavage. Amphibian EP-cadherin and XB/U ...

  4. Blastoid (embryoid) - Wikipedia

    en.wikipedia.org/wiki/Blastoid_(embryoid)

    A blastoid is an embryoid, [1] a stem cell-based embryo model which, morphologically and transcriptionally resembles the early, pre-implantation, mammalian conceptus, called the blastocyst. The first blastoids were created by the Nicolas Rivron laboratory [2] [3] by combining mouse embryonic stem cells and mouse trophoblast stem cells.

  5. Blastocoel - Wikipedia

    en.wikipedia.org/wiki/Blastocoel

    The blastocoel further expands and the inner cell mass becomes positioned on one side of the trophoblast cells forming a mammalian blastula, called a blastocyst. The axis formed by the inner cell mass and the blastocoel is the first axis of symmetry of mammalian embryo and determines its attachment point to the uterus.

  6. Cavitation (embryology) - Wikipedia

    en.wikipedia.org/wiki/Cavitation_(embryology)

    Cavitation is the formation of the blastocoel, a fluid-filled cavity that defines the blastula, or in mammals the blastocyst. [1] After fertilization, cell division of the zygote occurs which results in the formation of a solid ball of cells (blastomeres) called the morula.

  7. Animal embryonic development - Wikipedia

    en.wikipedia.org/wiki/Animal_embryonic_development

    Mammals at this stage form a structure called the blastocyst, characterized by an inner cell mass that is distinct from the surrounding blastula. [19] [20] [21] The blastocyst is similar in structure to the blastula but their cells have different fates.

  8. Blastomere - Wikipedia

    en.wikipedia.org/wiki/Blastomere

    The division of blastomeres from the zygote allows a single fertile cell to continue to cleave and differentiate until a blastocyst forms. The differentiation of the blastomere allows for the development of two distinct cell populations: the inner cell mass, which becomes the precursor to the embryo, and the trophectoderm, which becomes the precursor to the placenta.

  9. Cellular differentiation - Wikipedia

    en.wikipedia.org/wiki/Cellular_differentiation

    In humans, approximately four days after fertilization and after several cycles of cell division, these cells begin to specialize, forming a hollow sphere of cells, called a blastocyst. [9] The blastocyst has an outer layer of cells, and inside this hollow sphere, there is a cluster of cells called the inner cell mass. The cells of the inner ...