See Also: tricalcium phosphate(medicine)
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medicine man(dictionary)
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Retina (medicine) and tricalcium phosphate (medicine)


Retina (medicine)


retina
Light sensitive layer of the eye. In vertebrates, looking from outside, there are four major cell layers: (i) the outer neural retina, which contains neurons (ganglion cells, amacrine cells, bipolar cells) as well as blood vessels, (ii) the photoreceptor layer, a single layer of rods and cones, (iii) the pigmented retinal epithelium (PRE or RPE), (iv) the choroid, composed of connective tissue, fibroblasts and including a well vascularised layer, the chorio capillaris, underlying the basal lamina of the PRE. Behind the choroid is the sclera, a thick organ capsule.

In molluscs (especially cephalopods such as the squid) the retina has the light sensitive cells as the outer layer with the neural and supporting tissues below.

See: retinal rods, retinal cones, rhodopsin.


tricalcium phosphate (medicine)


tricalcium phosphate -->
tribasic calcium phosphate


Ca3(PO4)2;used as an antacid.

Synonym: bone ash, bone phosphate, tertiary calcium phosphate, tricalcium phosphate, whitlockite.