pigment layers

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• Pigment Red 170 — structures exist.In the initial α polymorph the molecules are arranged in a herringbone pattern with extensive hydrogen bonding. The φ polymorph is more dense and more stable and produced industrially by thermal treatment in water at 130°C under… …   Wikipedia

• Biological pigment — The Blue Morpho butterfly, native to Central America, derives its distinctive blue coloring from iridescence rather than from pigmentation. Biological pigments, also known simply as pigments or biochromes[1] are substances produced by living… …   Wikipedia

• Iris pigment epithelium — Anatomy The iris pigment epithelium (IPE) is a two cell thick layer of cuboidal cells lying behind the iris. Both layers are jet black due to the numerous large melanosomes which pack the cytoplasm of each cell. Towards the central axis, the IPE… …   Wikipedia

• retinal pigment layer — a single cell layer of pigmented epithelium covering the neural retina and developing from the outer of the two layers of the optic cup …   Dictionary of ichthyology

• megalaesthetes — n. pl. [Gr. megas, large; aisthesis, sensation] (MOLLUSCA: Polyplacophora) Large sensory organs terminating in the tegmentum in the forms of eyes with cornea, lens, pigment layers, iris and retina; see micraesthetes …   Dictionary of invertebrate zoology

• Vesicle — In dermatology, a vesicle is a small blister, as on the skin. Vesicles also occur on the mucous membranes, such as the buccal mucosa (the lining of the mouth). Vesicles are less than .5 centimeters in diameter.In anatomy, a vesicle is any small… …   Medical dictionary

• eye, human — ▪ anatomy Introduction  specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit       The eye is protected from mechanical injury… …   Universalium

• photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …   Universalium

• integument — /in teg yeuh meuhnt/, n. 1. a natural covering, as a skin, shell, or rind. 2. any covering, coating, enclosure, etc. [1605 15; < L integumentum a covering. See IN 2, TEGUMENT] Syn. 1. cortex, involucre, involucrum. * * * Covering of the body,… …   Universalium

• Retina — For the Retina display in the iPhone 4, see iPhone 4#Display. Retina Right human eye cross sectional view. Courtesy NIH National Eye Institute. Many animals hav …   Wikipedia

• painting — /payn ting/, n. 1. a picture or design executed in paints. 2. the act, art, or work of a person who paints. 3. the works of art painted in a particular manner, place, or period: a book on Flemish painting. 4. an instance of covering a surface… …   Universalium