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Choroid

Choroid

(Science: anatomy) middle layer of the vertebrate eye, between retina and sclera.

well vascularised and also pigmented to throw light back onto the retina (the tapetum is an irridescent layer in the choroid of some eyes). Not to be confused with the choroid plexus, a highly vascularised region of the roof of the ventricles of the vertebrate brain that secretes cerebrospinal fluid.


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Evolutions unsolved questions!

For the retina to be wired the way that Professor Richard Dawkins suggested, would require the choroid to come between the photoreceptor cells and the light, for retinal pigmented epithelial cells must be kept in intimate contact with both the choroid and photoreceptor ...

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by Squawkbox
Sat Feb 04, 2006 7:37 pm
 
Forum: Evolution
Topic: Evolutions unsolved questions!
Replies: 125
Views: 15399

Evolutions unsolved questions!

... reasons for the wiring of the human eye. For the retina to be wired the way that Professor Richard Dawkins suggested, would require the choroid to come between the photoreceptor cells and the light, for retinal pigmented epithelial cells must be kept in intimate contact with both the ...

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by Springer
Sat Feb 04, 2006 1:18 am
 
Forum: Evolution
Topic: Evolutions unsolved questions!
Replies: 125
Views: 15399


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