histogenesis


histogenesis
histogenetic /his'teuh jeuh net"ik/, adj.histogenetically, adv.
/his'teuh jen"euh sis/, n. Biol.
the origin and development of tissues.
[1850-55; HISTO- + -GENESIS]

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      series of organized, integrated processes by which cells of the primary germ layers of an embryo differentiate and assume the characteristics of the tissues into which they will develop. Although the final form of the cells that compose a tissue may not be evident until the organ itself is well along in development, distinctive biochemical reactions, which are the signatures of histogenesis, can be detected much earlier.

      Histogenesis can be detected at both the cellular and tissue level. The gradual conversion of an early mesoderm cell into a muscle cell is an example of histogenesis at the cellular level. Most often, however, single cells do not undergo histogenesis but change only when they are part of a larger group of cells acting at the tissue level, as when thousands of cells aggregate to form the tissue of the islets of Langerhans (Langerhans, islets of) in the pancreas. It is this tissue that produces insulin. The transformation of a mass of undifferentiated cells into an organ is known as organogenesis (q.v.).

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Universalium. 2010.

Look at other dictionaries:

  • Histogenesis — is the formation of different tissues from undifferentiated cells. [http://www.encarta.msn.com/dictionary /Histogenesis.html] These cells are constituents of three primary germ layers, the endoderm, mesoderm, and ectoderm. The science of the… …   Wikipedia

  • histogénesis — f. histol. Conjunto de procesos implicados en la formación y desarrollo de los tejidos. Medical Dictionary. 2011 …   Diccionario médico

  • Histogenesis — His to*gen e*sis, n. [Gr. isto s tissue + E. genesis.] (Biol.) (a) The formation and development of organic tissues; histogeny; the opposite of histolysis. (b) Germ history of cells, and of the tissues composed of cells. Haeckel. [1913 Webster] …   The Collaborative International Dictionary of English

  • histogenesis — histogenesis. См. гистогенез. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • histogenesis — [his΄tō jen′ə sis] n. [ HISTO + GENESIS] the process of tissue development and differentiation histogenetic [his΄tōjə nit′ik, Rhis΄təjə net′ik] adj. histogenetically adv …   English World dictionary

  • histogenesis — n. [Gr. histos, tissue; genesis, beginning] 1. The formation and development of tissues from the undifferentiated cells of the germ layers of the embryo. 2. (ARTHROPODA: Insecta) In holometabolic forms, histogenesis follows after histolysis of… …   Dictionary of invertebrate zoology

  • Histogenesis — audinių formavimasis statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Histogenesis ryšiai: platesnis terminas – pagrindiniai terminai sinonimas – histogenezė …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Histogenesis — audinių susidarymas statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Histogenesis ryšiai: platesnis terminas – žinduolių reprodukcija siauresnis terminas – ektoderma siauresnis terminas – endoderma siauresnis… …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

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  • Histogenesis — audinių susidarymas statusas T sritis embriologija atitikmenys: lot. Histogenesis ryšiai: platesnis terminas – dauginimasis siauresnis terminas – ektoderma siauresnis terminas – endoderma siauresnis terminas – mezoderma sinonimas – histogenezė …   Medicininės histologijos ir embriologijos vardynas


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