part_of
part of
part of
dorsal_to
ventral_to
only in taxon
only_in_taxon
develops_from
develops from
existence starts during
produces
produces
material entity
material entity
Chordata
sonic hedgehog protein
embryo stage
multi-tissue structure
neural tube
digestive tract
notochord
http://upload.wikimedia.org/wikipedia/commons/6/64/Gray19_with_color.png
notochorda
AAO:0000327
uberon
(...) at some stage of its development, every chordate exhibits five uniquely derived characters or synapomorphies of the group: (...) (3) a stiff, longitudinal rod of turgid cells along the dorsal part of the body that is called a notochord (...).[well established][VHOG]
XAO:0000055
VHOG:0000199
FMA:85521
NCIT:C12463
In between vertebra the notochord becomes the nucleus pulposus, under it degenerates, and at anterior end in some species its tissue merges with some of the cranial bones.. Some organisms retain a post-embryonic notochord.
VSAO:0000032
CALOHA:TS-0690
The notochord appears early in embryogeny and plays an important role in promoting or organizing the embryonic development of nearby structures. In most adult chordates the notochord disappears or becomes highly modified. In some non-vertebrate chordates and fishes the notochord persists as a laterally flexible but incompressible skeletal rod that prevents telescopic collapse of the body during swimming[TOLWEB]
UMLS:C0028439
EHDAA:6021
notochordal
http://evolution.berkeley.edu/evolibrary/images/history/notochords.jpg
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 chordates, it persists throughout life as the main axial support of the body, while in most vertebrates it becomes the nucleus pulposus of the intervertebral disc. The notochord is found ventral to the neural tube.
MESH:A16.254.610
Avascular multi-tissue structure composed of large vacuolated epithelial cells (chordablasts) and perichordal fibrous tissue.[VSAO]
Rod-like principal supportive element of the embryo and larva, present in the midline just ventral to the neural tube, and differentiating during the segmentation period to form large vacuolated epithelial cells and a surrounding a sheath of fibrous and elastic layers. Layering of the sheath may differ in structure, thickness and development among groups; in cypriniforms there are actually three very thin layers to the sheath. A functional, well developed notochord is present throughout life in certain basal fish groups but not in cypriniforms. Kimmel et al, 1995.[TAO]
UBERON:0002328
GAID:1311
EMAPA:16191
EHDAA:1241
Wikipedia:Notochord
BTO:0001768
SCTID:308820002
embryonic notocord
EHDAA2:0001277
notocord
ZFA:0000135
EV:0100002
relationship type change: differentiates_from mesoderm (AAO:0000304) CHANGED TO: develops_from mesoderm (UBERON:0000926)[AAO]
TAO:0000135
Slender rod of fibrous connective tissue surrounding a core of fluid-filled cells of mesodermal origin; it lies above the gut and directly beneath the spinal cord. The notochord is present during early development and in a few cases it is retained through life; however, usually the notochord is replaced by the vertebral column.[AAO]
MAT:0000281
ectoderm-derived structure
chordamesoderm
notochordal plate
axial skeletal system