Supstanca koja gradi rožno tkivo, dlake, nokte, perje i dr. (grč.)
Rožnina, belančevinasta tvar, supstancija u rogovima, pokožici, noktima i dlakama.
ETYM Greek keras, -atos, horn.
A fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair feathers nails and hooves; SYN. ceratin.
Fibrous protein found in the skin of vertebrates and also in hair, nails, claws, hooves, feathers, and the outer coating of horns.
If pressure is put on some parts of the skin, more keratin is produced, forming thick calluses that protect the layers of skin beneath.
Protein from which horns, nails, hair and similar tissues develop.