limb bud


limb bud
The limbs of vertebrates start as outpushings of mesenchyme surrounded by a simple epithelium. The distal region is referred to as the progress zone. There has been extensive study of positional information within the limb-bud that determines, for example, the proximal-distal pattern of bone development and the anterior-posterior specification of digits.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • limb bud — n a proliferation of embryonic tissue shaped like a mound from which a limb develops * * * an ectodermally covered mesenchymal swelling on the trunk of the embryo that becomes a limb …   Medical dictionary

  • Limb bud — Infobox Embryology Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Caption2 = System = CarnegieStage = Days = 29 Precursor = lateral plate mesoderm GivesRiseTo = MeshName = MeshNumber = DorlandsPre = DorlandsSuf = In embryology, the… …   Wikipedia

  • limb bud — noun : a proliferation of embryonic tissue shaped like a mound from which a limb develops …   Useful english dictionary

  • Limb development — The tetrapod limb develops from a specific area of the body axis called the limb field. The position of the limb field is associated with and presumably specified by the spatial pattern of Hox gene expression along the body axis. Retinoic acid… …   Wikipedia

  • bud — (Subclass Copepoda): The earliest step of a developing limb; a limb bud does not articulate with its somite and bear setae including at least the crown group of terminal setae. A limb bud often is considered functionless on immature stages… …   Crustacea glossary

  • bud — 1. An outgrowth that resembles the b. of a plant, usually pluripotential, and capable of differentiating and growing into a definitive structure. 2. To give rise to such an outgrowth. SEE ALSO: gemmation. 3. A small outgrowth from a parent cell;… …   Medical dictionary

  • bud — I. noun Etymology: Middle English budde Date: 14th century 1. a small lateral or terminal protuberance on the stem of a plant that may develop into a flower, leaf, or shoot 2. something not yet mature or at full development: as a. an incompletely …   New Collegiate Dictionary

  • Bud Daley — Infobox MLB retired bgcolor1=orange bgcolor2=green textcolor1=white textcolor2=white name=Bud Daley position=Pitcher bats=Left throws=Left birthdate=birth date and age|1932|10|7 debutdate=September 10 debutyear=by|1955 debutteam=Cleveland Indians …   Wikipedia

  • secondary bud — (Subclass Copepoda): A small, poorly differentiated limb which has been reconfigured from a limb bud or a transformed limb of a copepodid; a seconday bud usually is found on a chalimus (see bud and transformed limb) [Ferrari and Dahms, in press] …   Crustacea glossary

  • LBH — Limb bud and heart development homolog (mouse), also known as LBH, is a human gene.cite web | title = Entrez Gene: LBH limb bud and heart development homolog (mouse)| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene Cmd=ShowDetailView… …   Wikipedia


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