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单词 chondrocranium
释义

Definition of chondrocranium in English:

chondrocranium

nounˌkɒndrə(ʊ)ˈkreɪnɪəmˌkändrōˈkrānēəm
Embryology Zoology
  • The primary skull of vertebrates, composed of cartilage, which in humans and most other vertebrates is replaced by bone during development.

    Example sentencesExamples
    • The skulls of Devonian lungfish have a tessera of small superficial bones, fused to an ossified chondrocranium.
    • As with all crocodyliforms, the chondrocranium is invested with a series of internal recesses that presumably communicated with the pharynx in life.
    • The taenia tecti medialis, a bar of cartilage on the dorsomedial surface of the chondrocranium that bisects the parietal portion of the frontoparietal fontanelle, evolved in the common ancestor to neobatrachians.
    • The epaxial muscles insert on the posterior aspect of the chondrocranium, which later ossifies into the exoccipitals and supraoccipital of the skull.
    • In bony vertebrates, endochondral bones form from centers of ossification in the chondrocranium, although much of the braincase often remains cartilage.
 
 

Definition of chondrocranium in US English:

chondrocranium

nounˌkändrōˈkrānēəm
Embryology Zoology
  • The primary skull of vertebrates, composed of cartilage, which in humans and most other vertebrates is replaced by bone during development.

    Example sentencesExamples
    • The taenia tecti medialis, a bar of cartilage on the dorsomedial surface of the chondrocranium that bisects the parietal portion of the frontoparietal fontanelle, evolved in the common ancestor to neobatrachians.
    • The epaxial muscles insert on the posterior aspect of the chondrocranium, which later ossifies into the exoccipitals and supraoccipital of the skull.
    • As with all crocodyliforms, the chondrocranium is invested with a series of internal recesses that presumably communicated with the pharynx in life.
    • In bony vertebrates, endochondral bones form from centers of ossification in the chondrocranium, although much of the braincase often remains cartilage.
    • The skulls of Devonian lungfish have a tessera of small superficial bones, fused to an ossified chondrocranium.
 
 
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更新时间:2024/12/23 18:24:03