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  2. Fetal membranes - Wikipedia

    en.wikipedia.org/wiki/Fetal_membranes

    Therefore, it must obtain necessary nutrients and oxygen from nearby chorionic and amniotic fluid, and fetal surface vessels. [7] [8] The amnion is characterised by cuboidal and columnar epithelial layers. [7] The columnar cells are located in the vicinity of the placenta, whereas the cuboidal cells are found in the periphery. [7]

  3. Gestational sac - Wikipedia

    en.wikipedia.org/wiki/Gestational_sac

    The gestational sac is spherical in shape, and is usually located in the upper part (fundus) of the uterus.By approximately nine weeks of gestational age, due to folding of the trilaminar germ disc, the amniotic sac expands and occupy the majority of the volume of the gestational sac, eventually reducing the extraembryonic coelom (the gestational sac or the chorionic cavity) to a thin layer ...

  4. Amniotic sac - Wikipedia

    en.wikipedia.org/wiki/Amniotic_sac

    Amniotic cavity in human embryo 1.3 mm. long. The amniotic cavity is the closed sac between the embryo and the amnion, containing the amniotic fluid. The amniotic cavity is formed by the fusion of the parts of the amniotic fold, which first makes its appearance at the cephalic extremity and subsequently at the caudal end and sides of the embryo ...

  5. Chorion - Wikipedia

    en.wikipedia.org/wiki/Chorion

    Amniotic embryo. a=embryo, b=yolk, c=allantois, d=amnion, e=chorion. In reptiles, birds, and monotremes, the chorion is one of the four extraembryonic membranes that make up the amniotic egg that provide for the nutrients and protection needed for the embryo's survival. It is located inside the albumen, which is the white of the egg.

  6. Amnion - Wikipedia

    en.wikipedia.org/wiki/Amnion

    This, the amniotic fold, first makes its appearance at the cephalic extremity, and subsequently at the caudal end and sides of the embryo, and gradually rising, its different parts meet and fuse over the dorsal aspect of the embryo, and enclose a cavity, the amniotic cavity. This kind of amnion is known as pleuroamnion (formed by folding), as ...

  7. Everything You Need to Know About Amniotic Fluid - AOL

    www.aol.com/news/everything-know-amniotic-fluid...

    Often referred to as the "water" which surrounds an unborn baby, amniotic fluid plays a vital role in fetal development. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please ...

  8. Human embryonic development - Wikipedia

    en.wikipedia.org/wiki/Human_embryonic_development

    The epiblast is adjacent to the trophoblast and made of columnar cells; the hypoblast is closest to the blastocyst cavity and made of cuboidal cells. The epiblast migrates away from the trophoblast downwards, forming the amniotic cavity, the lining of which is formed from amnioblasts developed from the epiblast. The hypoblast is pushed down and ...

  9. Amniotic fluid - Wikipedia

    en.wikipedia.org/wiki/Amniotic_fluid

    The amniotic fluid is the protective liquid contained by the amniotic sac of a gravid amniote. This fluid serves as a cushion for the growing fetus, but also serves to facilitate the exchange of nutrients, water, and biochemical products between mother and fetus. For humans, the amniotic fluid is commonly called water or waters (Latin liquor ...