Origin and function of the yolk sac in primate embryogenesis
2020年7月28日 · Amnion: The innermost extraembryonic membrane consisting of a fluid-filled sac surrounding the embryo. Amnion provides a protective aqueous environment for the …
Extraembryonic tissues: exploring concepts, definitions and …
The importance of extraembryonic tissues is particularly evident in animals that have adapted to terrestrial life. For instance, amniotic vertebrates have four extraembryonic tissues: amnion, …
How two extraembryonic epithelia became one: serosa and amnion …
2022年10月17日 · During the radiation of flies, two extraembryonic epithelia, known as serosa and amnion, evolved into one, called amnioserosa. This unique extraembryonic epithelium is …
Embryology, Yolk Sac - StatPearls - NCBI Bookshelf
2023年3月6日 · The dorsal side of the bilaminar disc contains cells of the epiblast, which form the amnion, another extra-embryonic membrane. The amnion resides in the amniotic cavity. The …
The development of the amnion in mice and other amniotes
In reptiles and birds, amniogenesis initiates by the generation of an anterior and a posterior amniochorionic fold (red arrows) that envelop the embryo and meet dorsally at the midline. …
Controlled modelling of human epiblast and amnion …
2019年9月11日 · In the post-implantation human embryo, formation of the pro-amniotic cavity in the epiblast is followed by dorsal–ventral patterning, resolving the epiblast into a bipolar …
Amniotic sac - Wikipedia
The inner of these membranes, the amnion, encloses the amniotic cavity, containing the amniotic fluid and the embryo. The outer membrane, the chorion, contains the amnion and is part of the …
Origin and function of the yolk sac in primate embryogenesis
The amnion is a transparent membrane, which forms a fluid-filled sac surrounding the embryo. It provides an aquatic environment for the conceptus to prevent desiccation, ensures free …
Amniogenesis occurs in two independent waves in primates - Cell …
2022年5月5日 · Rostovskaya et al. discovered that in primate embryos the amnion is formed in two transcriptionally and temporally distinct waves of epiblast differentiation and established a …
four extraembryonic tissues: amnion, chorion, allantois and yolk sac, with each performing specialized, essential physiological functions. Terrestrial arthropods have evolved other …