somite

somite
—somital /soh"mi tl/, somitic /soh mit"ik/, adj.
/soh"muyt/, n.
1. any of the longitudinal series of segments or parts into which the body of certain animals is divided; a metamere.
2. Embryol. one member of a series of paired segments into which the thickened dorsal zone of mesoderm is divided.
[1865-70; SOM(A)1 + -ITE1]

* * *

      in embryology, one of a longitudinal series of blocklike segments into which the mesoderm, the middle layer of tissue, on either side of the embryonic spine becomes divided. Collectively, the somites constitute the vertebral plate. Out of the somites arise the sclerotome, forerunner of the bodies and neural arches of the vertebrae; the dermatome, precursor of the connective tissue of the skin; and the myotome, or primitive muscle, from which the major muscles of vertebrates are derived. The term somite is also used more generally to refer to a body segment, or metamere, of a segmented animal.

* * *


Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Somite — Transverse section of half of a chick embryo of forty five hours incubation. The dorsal (back) surface of the embryo is towards the top of this page, while the ventral (front) surface is towards the bottom …   Wikipedia

  • somite — [ sɔmit ] n. m. • 1893; en angl. (1869); du gr. sôma « corps » ♦ Embryol. Chacune des petites masses de tissu conjonctif résultant de la segmentation du mésoblaste situé de part et d autre du tube neural (⇒ métamère, métamérie), et dont… …   Encyclopédie Universelle

  • Somite — So mite (s[=o] m[imac]t), n. [Gr. sw^ma body.] (Anat. & Zo[ o]l.) One of the actual or ideal serial segments of which an animal, esp. an articulate or vertebrate, is composed; somatome; metamere. {So*mit ic}, a. [1913 Webster] …   The Collaborative International Dictionary of English

  • somite — somite. См. сомит. (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.

  • Somite — Somite, Ursegmente, in der Embryonalentwicklung der Chordatiere durch Gliederung des dorsalen Mesoderms entstehende, hintereinander liegende Segmente, aus denen sich im Verlauf der ⇒ Organbildung Anteile der Haut, die Skelettmuskulatur und die… …   Deutsch wörterbuch der biologie

  • somite — [sō′mīt΄] n. [< SOMA1 + ITE1] 1. METAMERE 2. a blocklike segment of mesodermal tissue in the vertebrate embryo, giving rise to muscle, bone, etc. somitic [sōmit′ik] adj. somital [sō′mit l] …   English World dictionary

  • somite — A body segment, especially of the abdomen [Chace and Hobbs, 1969]. Body segment, as in abdominal somites 1 6 [Poore, 2004]. Body segment, especially of the abdomen [Butler, T.H.]. Division of body (head, thorax, abdomen) with exoskeleton… …   Crustacea glossary

  • somite — a body segment. In the embryo an undifferentiated mesodermal component of an early trunk or tail segment or metamere, derived from paraxial mesoderm. The somite forms the myotome, sclerotome and perhaps dermatome …   Dictionary of ichthyology

  • somite — noun Etymology: International Scientific Vocabulary, from Greek sōma body Date: 1869 one of the longitudinal series of segments into which the body of many animals is divided ; metamere …   New Collegiate Dictionary

  • Somite — D origine mésodermique, les somites sont des structures embryonnaires des Myomérozoaires, situées de part et d autre du tube neural et de la chorde et composées d unités répétées le long de l axe antéro postérieur de l embryon. Le mésoderme para… …   Wikipédia en Français

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”