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  2. Surface ectoderm - Wikipedia

    en.wikipedia.org/wiki/Surface_ectoderm

    The surface ectoderm, AKA external ectoderm, is one of the two early embryonic divisions of the ectoderm. The other early division of the ectoderm is the neuroectoderm. The surface ectoderm develops into the following structures: Skin (only the epidermis; the dermis is derived from the mesoderm) (along with glands, hair, and nails)

  3. Ectoderm - Wikipedia

    en.wikipedia.org/wiki/Ectoderm

    The position of the ectoderm relative to the other germ layers of the embryo is governed by "selective affinity", meaning that the inner surface of the ectoderm has a strong (positive) affinity for the mesoderm, and a weak (negative) affinity for the endoderm layer. [6] This selective affinity changes during different stages of development.

  4. Germ layer - Wikipedia

    en.wikipedia.org/wiki/Germ_layer

    The ectoderm generates the outer layer of the embryo, and it forms from the embryo's epiblast. [13] The ectoderm develops into the surface ectoderm, neural crest, and the neural tube. [14] The surface ectoderm develops into: epidermis, hair, nails, lens of the eye, sebaceous glands, cornea, tooth enamel, the epithelium of the mouth and nose.

  5. Eye development - Wikipedia

    en.wikipedia.org/wiki/Eye_development

    Surface ectoderm forms the lens, corneal epithelium and eyelid. The extracellular mesenchyme forms the sclera , the corneal endothelium and stroma , blood vessels , muscles , and vitreous . The eye begins to develop as a pair of optic vesicles on each side of the forebrain at the end of the fourth week of pregnancy.

  6. List of human cell types derived from the germ layers - Wikipedia

    en.wikipedia.org/wiki/List_of_human_cell_types...

    This page was last edited on 30 December 2024, at 15:41 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  7. Organogenesis - Wikipedia

    en.wikipedia.org/wiki/Organogenesis

    Differentiation of the ectoderm into the neural crest, neural tube, and surface ectoderm is sometimes referred to as neurulation and the embryo in this phase is the neurula. The coelom of the body forms from a split of the mesoderm along the somite axis [1]

  8. Animal embryonic development - Wikipedia

    en.wikipedia.org/wiki/Animal_embryonic_development

    A shallow groove, the primitive groove, appears on the surface of the streak, and the anterior end of this groove communicates by means of an aperture, the blastopore, with the yolk sac. The primitive streak is produced by a thickening of the axial part of the ectoderm, the cells of which multiply, grow downward, and blend with those of the ...

  9. Neuroectoderm - Wikipedia

    en.wikipedia.org/wiki/Neuroectoderm

    Neuroectoderm (or neural ectoderm or neural tube epithelium) consists of cells derived from the ectoderm. Formation of the neuroectoderm is the first step in the development of the nervous system . [ 1 ]