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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

Contents

FormationEdit

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 oviparousEdit

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 alsoEdit

ReferencesEdit

  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 Encyclop√¶dia: Illustrated (1935); out of UK copyright as of 2005.
  • Campbell Reece, Biology 7th edition, Pearson Publishing, 2005