What Is an Amniotic Sac?
The amniotic sac is two tough, thin, transparent membranes that sit within the placenta of a placental animal. Holds a developing embryo (later becoming a fetus) until shortly before birth. The inner membrane is the amniotic membrane containing amniotic fluid and embryos. The outer membrane chorion envelopes the amniotic membrane and is itself part of the placenta.
Amniotic sac
discuss
- Chinese name
- Amniotic sac
- Pinyin
- yang mo nang
- Explanation
- Within the placenta of a placental animal
- Part of speech
- noun
- The amniotic sac is two tough, thin, transparent membranes that sit within the placenta of a placental animal. Holds a developing embryo (later becoming a fetus) until shortly before birth. The inner membrane is the amniotic membrane containing amniotic fluid and embryos. The outer membrane chorion envelopes the amniotic membrane and is itself part of the placenta.
- Amniotic sac (9 photos)
- When the blastocysts were implanted in the second week, the cells of the inner cell population also proliferated and differentiated, and gradually formed a disc-shaped embryonic disc. At this time, the blastoderm consists of the inner and outer germ layers. The ectoderm is a layer of columnar cells adjacent to the trophoblast. The endoderm is a layer of cubic cells located on the side of the blastocyst cavity. Next, a cavity appeared on the side of the ectoderm near the trophoblast, the amniotic cavity, and the cavity wall was the amniotic membrane. The amniotic membrane continues to the perimeter (edge) of the ectoderm, so the ectoderm forms the bottom of the amniotic cavity.
- A sac formed by amniotic membrane surrounds the entire fetus, the sac is filled with amniotic fluid, and the fetus is suspended therein. Membrane sac of sheep and cattle ... The amniotic sac is located in the chorionic sac, on one side of the allantoin (bovine, sheep), or in the allantoin (horse, donkey) in the chorion, where the amnion fuses with the allantoic sac It is called amniotic membrane, and the part that is fused with chorion is called amniotic chorion.