notochord definition

  • noun:
    • A flexible rodlike framework that types the main help associated with the body when you look at the least expensive chordates, including the lancelet; a primitive backbone.
    • an equivalent framework in embryos of higher vertebrates, from which the backbone develops.
    • A flexible rodlike construction that forms the main support of this human body when you look at the most affordable chordates; a primitive spine
    • A similar structure based in the embryos of vertebrates from where the back develops
    • An elastic cartilagelike rod that will be developed underneath the medullary groove in vertebrate embryo, and comprises the primitive axial skeleton around which the centra associated with vertebr√¶ additionally the posterior an element of the base of the head are developed; the chorda dorsalis. See Illust. of ectoderm.
    • The chorda dorsalis or ancient backbone: a fibrocellular or cartilaginous rod-like framework that is developed in vertebrates given that basis for the future backbone, and about that the figures into the future vertebr√¶ are formed.
    • A vestigial framework, representing a rather old as a type of alimentary channel perhaps not in itself part of the skeleton.
    • a flexible rodlike structure that forms the supporting axis regarding the human anatomy in cheapest chordates and cheapest vertebrates and in embryos of greater vertebrates

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