Template:Frog Cornea Timeline table: Difference between revisions
From Embryology
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|+ '''Frog Cornea Timeline''' | |+ '''Frog Cornea Timeline''' | ||
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| cornea has attained the adult structure of three cellular layers, epithelium, stroma, and endothelium, and between the cellular layers lie two acellular layers (Bowman's layer and Descemet's membrane) | | cornea has attained the adult structure of three cellular layers, epithelium, stroma, and endothelium, and between the cellular layers lie two acellular layers (Bowman's layer and Descemet's membrane) | ||
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| Table data{{#pmid:23896054|PMID23896054}} | {{frog}} | {{vision}} | | colspan=2|Table data from ''Xenopus laevis''{{#pmid:23896054|PMID23896054}} | {{frog}} | {{vision}} | ||
|}<noinclude>[[Category:Template]][[Category:Timeline]][[Category:Frog]][[Category:Vision]]</noinclude> | |}<noinclude>[[Category:Template]][[Category:Timeline]][[Category:Frog]][[Category:Cornea]][[Category:Vision]]</noinclude> |
Latest revision as of 12:05, 17 April 2018
Stage | Event |
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stage 25 | cornea starts from a simple embryonic epidermis overlying developing optic vesicle |
stage 30 | detachment of lens placode, cranial neural crest cells start to invade the space between the lens and the embryonic epidermis to construct the corneal endothelium. |
stage 41 | second wave of migratory cells containing presumptive keratocytes invades the matrix, leading to formation of inner cornea and outer cornea. A unique cell mass (stroma attracting center) connects the two layers like the center pole of a tent. |
stage 48 | secondary stromal keratocytes individually migrate to the center and form the stroma layer. |
stage 60 | stroma space is filled by collagen lamellae and keratocytes, and the stroma attracting center disappears. At early metamorphosis, embryonic epithelium gradually changes to adult corneal epithelium, covered by microvilli. |
stage 62 | embryonic epithelium thickens and cell death is observed in the epithelium, coinciding with eyelid opening. |
After metamorphosis | cornea has attained the adult structure of three cellular layers, epithelium, stroma, and endothelium, and between the cellular layers lie two acellular layers (Bowman's layer and Descemet's membrane) |
Table data from Xenopus laevis[1] | frog | vision |