...liferation, 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 ...
...ural 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 so...
is a flexible, rod-shaped body found in embryos of all chordates. It is composed of cells derived from the mesoderm and defines the primitive axis of the embryo. In some vertebrates and chordates, it persists throughout life as the main axial support of... notochord
( ) n...
...e 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 s...
...shmermaid. Filament Recordings ... ... include: notochord
replaced by spinal chord , internal ... organizat...erve cord is a hollow tube lying dorsal to the notochord
that becomes ... animals known as lancelates th...abs. Give me power to end all of the strife ... notochord
extends beyond nerve chord to anterior of ani...
...ed 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 necessa...
...derm 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 dic...
... 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 Referenc...
...astula. ... 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 ... ...
... 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 chordat...
...me from one of their synapomorphies, or derived ... All chordates have a notochord
at some stage in their lives, but in some (such ... Most chordates ha... ... Although the majority of chordates are vertebrates (animals whose notochord
is ... ... distinctive derived characteristics of chordates distingui...