Amnion: Difference between revisions
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[[File:2910 The Placenta-02.jpg|thumb|Embryonic envelopes and placenta]] | [[File:2910 The Placenta-02.jpg|thumb|Embryonic envelopes and placenta]] | ||
'''Amnion''' (Greek amnos = lamb, amnion = "sheep's membrane") is '''the internal fetal envelope''' delimiting the cavity filled with [[amniotic fluid|amniotic fluid]]. It consists of ''' | '''Amnion''' (Greek amnos = lamb, amnion = "sheep's membrane") is '''the internal fetal envelope''' delimiting the cavity filled with [[amniotic fluid|amniotic fluid]]. It consists of '''[[ectoderm|ectoderm]]''' and ''' extraembryonic mesoderm''' (extraembryonic mesoderm subsequently differentiates into [[mesenchyme ]]and the latter into the fibrous layer). By enlarging the amniotic cavity, the amnion envelopes the germinal shaft and [[ductus omphaloentericus]], connects them together and helps the primitive umbilical cord to form. In the third of its development (end of the third month), it fuses with the chorion and forms a [[chorioamnion|chorioamnion]]. | ||
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Revision as of 23:02, 8 January 2023
Amnion (Greek amnos = lamb, amnion = "sheep's membrane") is the internal fetal envelope delimiting the cavity filled with amniotic fluid. It consists of ectoderm and extraembryonic mesoderm (extraembryonic mesoderm subsequently differentiates into mesenchyme and the latter into the fibrous layer). By enlarging the amniotic cavity, the amnion envelopes the germinal shaft and ductus omphaloentericus, connects them together and helps the primitive umbilical cord to form. In the third of its development (end of the third month), it fuses with the chorion and forms a chorioamnion.
Links
Related articles
- Placenta
- The first week of embryo development
- Portal: Embryological preparations
- Prenatal period
- embryonic envelopes and placenta
External references
Bibliography
- VOKURKA, Martin – HUGO, Jan, et al. Velký lékařský slovník. 9. edition. Praha : Maxdorf, 2009. 1159 pp. ISBN 978-80-7345-202-5.
- SADLER, Thomas, W – SINHA, M.D. Langmanova lékařská embryologie. 1. české edition. Praha : Grada, 2011. 414 pp. ISBN 978-80-247-2640-3.
