| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,920,482,116 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Somite |
Also found in: Dictionary/thesaurus, Medical, Wikipedia | 0.01 sec. |
|
|
somite [′sō‚mīt]
(zoology) 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. |
|
| Mentioned in | ? | References in periodicals archive | ? | Encyclopedia browser | ? | Full browser | ? | |||
|---|---|---|---|---|---|---|---|---|---|---|
No references found | Remarks Presumable synapomorphies among species of Chorocaris and Rimicaris are the following: the tendency of a rostral reduction, nonacuminate antennal tooth of the carapace, nonmarginally dentate posterolateral margin of pleura of fourth and fifth pleonal somites, the presence of a distolateral transverse suture on the antennal scale, and the nonacuminate uropodal protopod. 2002), injecting a CdSe/ZnS micelle (PEG-PE and phosphatidylcholine) conjugated with an oligonucleotide into Xenopus embryos, observed QD labeling of all embryonic cell types, including somites, neurons, axonal tracks, ectoderm, neural crest, and endoderm. Typically, KFS results from failure of the normal segmentation of the somites during weeks 3 to 8 of gestation. |
Somites |
Somewhere Over The Rainbow somewhere to hang hat somewheres Somewhile Somewhither somewise SOMF SOMFA SOMH SOMHD SOMI SOMI SOMI SOMIH SOMILO SOMIMA Sominex SOMIPAR SOMIQ SoMIRAC SOMIS SOMISS SOMIT somite somite somite somite embryo somite embryo somite embryo somite embryo Somites somiticsomitic somitic Somitomer Somitomere Somitomeres Somkheti Somkhiti Soml SOMLA SOMLAL Somlay, Arthur SOMLS SOMM Somma Somma Somma Somma volcano Sommaire des Motifs de Décision SOMMBL Somme Somme Somme (département) Somme (département) Somme River Somme River Somme River (France) Somme River (France) Somme, Battle of the Somme, Battle of the | |||||||
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|