The amnion (pl.: amnions or amnia) is a membrane that closely covers human and various other embryos when they first form. It fills with amniotic fluid, which causes the amnion to expand …

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Amnion, in reptiles, birds, and mammals, a membrane forming a fluid-filled cavity (the amniotic sac) that encloses the embryo. The amniotic sac and the fluid it contains are sometimes …

The meaning of AMNION is a thin membrane forming a closed sac about the embryos or fetuses of reptiles, birds, and mammals and containing the amniotic fluid.

Jul 19, 2025 · The amnion is the thin but durable innermost membrane that surrounds and protects a developing embryo, and later the fetus, during pregnancy. It is a component of the …

The amnion is a closed sac appearing in the inner cell mass as a cavity. This cavity is roofed in by a single stratum of flattened, ectodermal cells called the amniotic ectoderm.

Amnion is defined as a fluid-filled sac that surrounds the embryo in higher vertebrates, including reptiles, birds, and mammals, providing moisture and protection from shock during the …

Amniotic membrane (AM) or amnion is a thin membrane on the inner side of the fetal placenta; it completely surrounds the embryo and delimits the amniotic cavity, which is filled by amniotic …

Oct 30, 2024 · The amnion plays a critical role in the health of the fetus’s amniotic sac. Without the amniotic membrane, an amniotic sac wouldn’t be able to form and expand, contain …

Jun 2, 2017 · The amnion is an extraembryonic membrane that surrounds a developing amniote embryo. It acts as a protective sac along with three other extraembryonic membranes: the …