Cloacal membrane
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| Cloacal membrane | ||
|---|---|---|
| Gray's | subject #6 47 | |
| Carnegie stage | 7 | |
| Precursor | caudal end of the primitive streak | |
| Dorlands/Elsevier | m_08/12522517 | |
The region at the hind end of the embryo where the ectoderm and endoderm come into apposition and form is called the cloacal membrane.
[edit] External links
- Swiss embryology (from UL, UB, and UF) hdisqueembry/triderm04
- Embryology at UNC genital-021
- Diagram at unsw.edu.au
- Overview at ana.ed.ac.uk
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
| Mammalian development of embryo and development of fetus (some dates are approximate - see Carnegie stages) |
|---|
| Week 1: Zygote - Morula - Blastula/Blastomere/Blastosphere - Archenteron/Primitive streak - Blastopore - Allantois - Trophoblast (Cytotrophoblast - Syncytiotrophoblast - Gestational sac)
Week 2: Yolk sac - Vitelline duct - Bilaminar disc Week 3: Hensen's node - Gastrula/Gastrulation - Trilaminar embryo Branchial arch (1st) - Branchial pouch - Meckel's cartilage - Somite/Somitomere - Sclerotome - Myotome - Germ layer (Ectoderm, Endoderm, Mesoderm, Chordamesoderm, Paraxial mesoderm, Intermediate mesoderm, Lateral plate mesoderm, Splanchnopleure, Somatopleure) Histogenesis and Organogenesis Uterine support: Placenta - Umbilical cord (Umbilical artery, Umbilical vein, Wharton's jelly) - Amniotic sac (Amnion, Chorion) |
