Blastoderm

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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

Formation[edit]

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[edit]

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[edit]

References[edit]

  1. ^ Gilbert, Scott F. (2000). Early Drosophila Development (6 ed.). Sunderland (MA): Sinauer Associates. Retrieved 20 April 2018.
  2. ^ "blastoderm". The Free Dictionary. Retrieved 20 April 2018.
  3. ^ Gilbert, Scott F. (2000). Early Drosophila Development (6 ed.). Sunderland (MA): Sinauer Associates. Retrieved 20 April 2018.
  4. ^ "Tutorial on chick early development". www.ucl.ac.uk. University College London.
  5. ^ Bellairs, Ruth; Osmond, Mark. Atlas of Chick Development (3 ed.). Atlas Press. p. 15-28. |access-date= requires |url= (help)
  • This article incorporates text from The Modern World Encyclopædia: Illustrated (1935); out of UK copyright as of 2005.
  • Campbell Reece, Biology 7th edition, Pearson Publishing, 2005