单词 | notochord |
释义 | BETA Examples ofnotochordDictionary> Examples ofnotochord notochordisn’t in the Cambridge Dictionary yet. You can help! Add a definition This assay is based on the angle thenotochordmakes with a line drawn through the middle of the ear and eye. From theCambridge English Corpus It is distinct from the mesoderm underneath the neural tube which is called the chordamesoderm and becomes thenotochord. From Wikipedia ![]() The more rostral portion of the chondrocranium that lie anterior to thenotochordconstitutes the prechordal chondrocranium, and is derived primarily from neural crest-derived mesenchyme. From Wikipedia ![]() This process is also tied to the development of an anterior brain in the chordates from thenotochord. From Wikipedia ![]() Sonic hedgehog is the secreted protein which mediates signaling activities of thenotochordand floor plate. From Wikipedia ![]() The spinal cord is protected by the vertebral column and is above thenotochordand the gastrointestinal tract is below it. From Wikipedia ![]() However, a few vertebrates, such as the sturgeon and the coelacanth retain thenotochordinto adulthood. From Wikipedia ![]() It is now widely agreed that conodonts had large eyes, fins with fin rays, chevron-shaped muscles and anotochord. From Wikipedia ![]() Thenotochorddisappears in the sclerotome (vertebral body) segments, but persists in the region of the intervertebral discs as the nucleus pulposus. From Wikipedia ![]() However, a few fish have secondarily lost this anatomy, retaining thenotochordinto adulthood, such as the sturgeon. From Wikipedia ![]() Thenotochordplays an integral role in the development of the neural tube. From Wikipedia ![]() Thenotochord, which is present in the young, is gradually replaced by cartilage. From Wikipedia ![]() Instead of true vertebrae, they have a series of cartilaginous structures called arcualia arranged above thenotochord. From Wikipedia ![]() Thenotochordbecomes a canal within the embryo known as the neural canal. From Wikipedia ![]() As the endoderm proliferates, thenotochordis dragged into the middle of the developing embryo. From Wikipedia ![]() Ectodermal cells overlying thenotochorddevelop into the neural plate in response to a diffusible signal produced by thenotochord. From Wikipedia ![]() Thenotochordforms during gastrulation and soon after induces the formation of the neural plate (neurulation), synchronizing the development of the neural tube. From Wikipedia ![]() In humans, by the age of 4, allnotochordresidue is replaced by a population of chondrocyte-like cells of unclear origin. From Wikipedia ![]() In most vertebrates thenotochordbecomes the nucleus pulposus of the intervertebral discs. From Wikipedia ![]() These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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