animal keratin

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• animal development — Introduction  the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …   Universalium

• Keratin — Protein in the upper layer of the skin, hair, nails and animal horns. The word keratin comes from the Indo European ker meaning horn. * * * Collective name for a group of proteins that form the intermediate filaments in epithelial cells. Keratins …   Medical dictionary

• keratin — n. [Gr. keras, horn] A sulfur containing nitrogenous compound found in animal tissues such as horn, hair and nails …   Dictionary of invertebrate zoology

• keratin — /ˈkɛrətən / (say keruhtuhn) noun a fibrous protein found in the outer layer of human and animal skin, also in horn, feathers, hair, hoofs, nails, etc. Also, ceratin. {Greek keras horn + in2} …  

• 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

• protein — proteinaceous /proh tee nay sheuhs, tee i nay /, proteinic, proteinous, adj. /proh teen, tee in/, n. 1. Biochem. any of numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the… …   Universalium

• skin — skinlike, adj. /skin/, n., v., skinned, skinning, adj. n. 1. the external covering or integument of an animal body, esp. when soft and flexible. 2. such an integument stripped from the body of an animal, esp. a small animal; pelt: a beaver skin.… …   Universalium

• reptile — reptilelike, adj. reptiloid /rep tl oyd /, adj. /rep til, tuyl/, n. 1. any cold blooded vertebrate of the class Reptilia, comprising the turtles, snakes, lizards, crocodilians, amphisbaenians, tuatara, and various extinct members including the… …   Universalium

• cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… …   Universalium

• Horn (anatomy) — A horn is a pointed projection of the skin on the head of various mammals, consisting of a covering of horn (keratin and other proteins) surrounding a core of living bone. True horns are found only among the ruminant… …   Wikipedia

• Skin — For the article about skin in humans, see human skin. For other uses, see Skin (disambiguation). Skin A diagram of human skin …   Wikipedia