Blastoderm Explained

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]

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.[1]

In oviparous animals

In chicken eggs, the blastoderm represents a flat disc after embryonic fertilization.[3] At the edge of the blastoderm is the site of active migration by most cells.[4]

DNA repair genes are highly expressed in chicken blastoderms.[5]

See also

References

  1. Book: Gilbert. Scott F.. Early Drosophila Development. 2000. Sinauer Associates. Sunderland (MA). 6. 20 April 2018. en.
  2. Web site: blastoderm. The Free Dictionary. 20 April 2018.
  3. Web site: Tutorial on chick early development. www.ucl.ac.uk. University College London. en.
  4. Book: Bellairs. Ruth. Osmond. Mark. Atlas of Chick Development. Atlas Press. 15–28. 3.
  5. Rengaraj D, Won S, Jung KM, Woo SJ, Lee H, Kim YM, Kim H, Han JY. Chicken blastoderms and primordial germ cells possess a higher expression of DNA repair genes and lower expression of apoptosis genes to preserve their genome stability. Sci Rep. 2022 Jan 7;12(1):49. doi: 10.1038/s41598-021-04417-y. PMID 34997179; PMCID: PMC8741993

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