Blastoderm
A blastoderm (germinal disc, blastodisc) is a single layer of embryonic epithelial tissue that makes up the blastula.[1] It encloses the fluid filled blastocoel. Gastrulation follows blastoderm formation, where the tips of the blastoderm begins the formation of the ectoderm, mesoderm, and endoderm.[2]
![Blastula (PSF) en rotate 05.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/4/43/Blastula_%28PSF%29_en_rotate_05.jpg/200px-Blastula_%28PSF%29_en_rotate_05.jpg)
Formation[]
The blastoderm is formed when the oocyte plasma membrane begins cleaving by invagination, creating multiple cells that arrange themselves into an outer sleeve to the blastocoel.[3]
In oviparous[]
In chicken eggs, the blastoderm represents a flat disc after embryonic fertilization.[4] At the edge of the blastoderm is the site of active migration by most cells.[5]
See also[]
- Blastodisc
- Embryology
- Cleavage
- Gastrulation
References[]
- ^ Gilbert, Scott F. (2000). Early Drosophila Development (6 ed.). Sunderland (MA): Sinauer Associates. Retrieved 20 April 2018.
- ^ "blastoderm". The Free Dictionary. Retrieved 20 April 2018.
- ^ Gilbert, Scott F. (2000). Early Drosophila Development (6 ed.). Sunderland (MA): Sinauer Associates. Retrieved 20 April 2018.
- ^ "Tutorial on chick early development". www.ucl.ac.uk. University College London.
- ^ Bellairs, Ruth; Osmond, Mark. Atlas of Chick Development (3 ed.). Atlas Press. p. 15–28.
- Campbell Reece, Biology 7th edition, Pearson Publishing, 2005
Categories:
- Embryology