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Notochord in Medical News

Genome sequence of lancelet shows how genes quadrupled during vertebrate evolution

... Cephalocordates and urochordates are invertebrates that have a flexible notochord rather than a bony spine protecting their spinal cord. The Florida ... floridae, looks a lot like a fish, but has a stiff cartilaginous notochord that it vibrates to swim and burrow in the sand, where it nestles during ...
Notochord in Medical Dictionary

Vertebrae

... the spaces between the vertebrae which may cause compress ion of the nerve roots. Chordoma is a rare tumor that arises from remnants of the notochord within the clivus, spinal vertebrae , or sacrum. The incidence in the United States is around one case per 1 million people per year. These ...
Notochord in Biological Definition

Apoptosis

... combined with selective apoptosis, sculpts developing tissues in vertebrates. During vertebrate embryo development, structures called the notochord and the floor plate secrete a gradient of the signaling molecule Sonic hedgehog (Shh), and it is this gradient that directs cells to form patterns ...

Neural tube

... tube is the result of an invagination of the ectoderm following gastrulation . This process is induced by signaling molecules produced in the notochord and basal plate . Neural tube defects Normally the closure of the neural tube occurs around the 30th day after fertilization . However, if ...
Notochord in Biological Dictionary

Notochord

... The notochord is a flexible, rod-shaped body found in embryos ... life as the main axial support ... notochord ( ) n. A flexible rodlike structure that forms ... in the animal kingdom, characterized by a notochord , nerve cord, and gill slits; includes the ...

Nerve chord

... Filament Recordings ... ... include: notochord replaced by spinal chord , internal ... ... cord is a hollow tube lying dorsal to the notochord that becomes ... animals known as lancelates ... Give me power to end all of the strife ... notochord extends beyond nerve chord to anterior of ...

Chordates

... from one of their synapomorphies, or derived ... All chordates have a notochord at some stage in their lives, but in some (such ... Most chordates ... ... Although the majority of chordates are vertebrates (animals whose notochord is ... ... distinctive derived characteristics of chordates ...

Somite

... SOMITE'S on Thesaurus ... somite ( ) n. See metamere . A segmental mass of mesoderm in the vertebrate embryo, occurring in pairs along the notochord and developing into muscles Information about somite in the free online English dictionary and encyclopedia. ... somite - one of a series of ...

Myotome

... dorsally and ventrally, ... ... differentiates, suggesting that myotome development requires additional signals. ... Xtwi is expressed in the notochord and lateral plate, but not in the myotome ; ... Developmental Biology provides the fundamental set of techniques, paradigms, and models ...

Mesoderm

... is found in all large, complex animals, and allows the formation of a coelom ... (also known as axial mesoderm )which later on gives rise to notochord ... Encyclopedia article about mesoderm . Information about mesoderm in the Columbia Encyclopedia, Computer Desktop Encyclopedia, computing ...

Dorsal aorta

... Each primitive aorta receives anteriorly a vein—the vitelline vein—from the yolk-sac, and is prolonged backward on the lateral aspect of the notochord under the name of the dorsal aorta . Aspects of the topic dorsal - aorta are discussed in the following places at Britannica. Assorted ...

Dorsal lip

... ... The dorsal lip is stained. Photo from Randy Moon. E. Gastrula. ... Lim1 expression in the dorsal lip of the blastopore and notochord ... By the expression of Lim1, we identified the dorsal lip ... ...

Chordate

... Information about chordate in the free online English dictionary and encyclopedia. ... chordate - any animal of the phylum Chordata having a notochord or ... Chordates are well represented in marine, freshwater and terrestrial ... The draft genome of Ciona intestinalis: Insights into ...

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