| 释义 |
pigment epithelium
pigment epithelium[‚pig·mənt ‚ep·ə′thē·lē·əm] (histology) A heavily pigmented layer of epithelial cells interposed between the photoreceptors of the vertebrate retina and their blood supply, the choroid. It forms a barrier regulating the exchange of fluids and substances between the blood and outer layer of the retina; it also plays a number of roles in support of photoreceptor structure and function in vertebrates. pigment epithelium
pig·ment ep·i·the·li·umepithelium composed of cells containing granules of pigment or melanin, as in the retinal or iris pigment layer. |