Somite
(redirected from Primitive segments)

Also found in: Dictionary/thesaurus, Medical, Wikipedia

0.01 sec.

somite [′sō‚mīt]

(zoology)

metamere

Somite

a paired metameric formation in the embryos of such invertebrates as annelids and insects and in the embryos of man and all other chordates. The middle germ layer, or mesoderm, is segmented into somites during embryonic development. The somites are arranged along the longitudinal axis of the body alongside the neural tube and the chorda. The entire mesoderm is segmented in invertebrates, whereas in man and other chordates only its dorsal section is segmented, with the remaining mesoderm forming lateral plates, or splanchnotomes. Segmentation begins from the anterior section of the body and gradually extends to the posterior section. In the process of development, each somite decomposes into a myotome, a sclerotome, and a dermatome, from which are formed, respectively, the truncal musculature, the axial skeleton (in fish, also the skeleton of the fins), and the connective-tissue portion of the skin and its derivatives.

T. A. DETLAF

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.

?Page tools

Printer friendly
Cite / link

Feedback

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			primibrach priming priming coat priming composition priming of the tides priming pump Primitiopsacea Primitive primitive abstract data type primitive abundant number Primitive Accumulation of Capital primitive cell primitive circle Primitive Communal System primitive element primitive equations primitive gut Primitive Human Herd primitive lattice primitive period primitive period parallelogram primitive plane primitive polynomial primitive pseudoperfect number Primitive Root Primitive segments Primitive Streak primitive translation primitive water Primitivism Primo de Rivera Primo de Rivera, Jose Antonio Primo de Rivera, José Antonio Primo de Rivera, Miguel Primofilices Primogeniture Primogeniture, Decree on primordial primordial black holes primordial germ cell primordial gut primordium Primore Krai Primore Operation of 1922 Primorsk Primorskii Primorskii Kurort Primorskii Range Primorsko-Akhtarsk Primorskoe Primorsky Kray			Primitive Origins (album) Primitive Origins (album) Primitive Origins (album) Primitive orthodox Primitive ovum Primitive ovum Primitive ovum primitive ovum, primordial ovum primitive ovum, primordial ovum primitive ovum, primordial ovum primitive period primitive period parallelogram primitive person Primitive pit Primitive plane Primitive plane Primitive polynomial Primitive pseudoperfect number Primitive Pythagorean Triple Primitive Recursive Kernel Primitive reflex Primitive reflexes Primitive reflexes Primitive reflexes primitive ridge Primitive rocks Primitive root Primitive root of unity Primitive Securities Primitive security Primitive segments Primitive semiperfect number Primitive sheath primitive streak primitive streak primitive streak primitive streak primitive streaks primitive streaks primitive streaks Primitive Switching Element primitive translation Primitive Trigeminal Artery Variant primitive water Primitive yolk sac Primitive yolk sac Primitive yolk sac Primitive, Grain and Point Configuration primitively primitively primitively primitively primitiveness primitiveness primitiveness primitiveness Primitives Primitives Primitives Primitives primitivism

Encyclopedia

Free Tools:	For surfers: Free toolbar & extensions \| Word of the Day \| Help For webmasters: Free content \| Linking \| Lookup box \| Double-click lookup

Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.

Somite (redirected from Primitive segments)

Somite
(redirected from Primitive segments)