Meaning of Dunham. Celtic name. In Celtic, the name Dunham means - Dark skinned fighter.. Other origins for the name Dunham include - Celtic, Irish.The name Dunham is most often used as a boy name or male name. Celtic Name Meaning - Dark skinned fighter. Origin - Celtic.
eyeball. 1  Photoreceptors are the cells in the retina that respond to light. Their distinguishing feature is the presence of large amounts of tightly packed membrane that contains the photopigment rhodopsin or a related molecule.
Monkey. Mouse. The retinal pigment epithelium (RPE) is the pigmented cell layer located just outside the retina and is attached to what is called the choroid, a layer filled with blood vessels that nourish the retina.The RPE closely interacts with photoreceptors in the maintenance of visual function.The RPE is composed of a single layer of hexagonal cells that are densely packed with granules of melanin that absorbs the light energy that arrive to the retina.he RPE closely interacts with photoreceptors in the maintenance of visual function. The RPE is composed of a single layer of hexagonal cells that are densely packed with granules of melanin that absorbs the light energy that arrive to the retina.