dentine A hard mesodermal material in teeth and some scales (cosmoid, ganoid and placoid scales) produced by odontobasts.
齿
组成牙齿或某
片(硬与盾)中层的坚硬
。
)具有齿
的dentine A hard mesodermal material in teeth and some scales (cosmoid, ganoid and placoid scales) produced by odontobasts.
齿组成牙齿或某片(硬与盾)中层的坚硬。
enamel A shiny hard material covering the dentine of teeth and the surface of some scales (cosmoid and placoid scales).
琅有光泽的坚硬包覆在牙齿及
片(圆与盾)表面。这是脊椎动所产生最坚硬的。
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