dentine A hard mesodermal material in teeth and some scales (cosmoid, ganoid and placoid scales) produced by odontobasts.
组成牙或某些鳞片(
鳞与盾鳞)中层
坚
。
鳞
dentine A hard mesodermal material in teeth and some scales (cosmoid, ganoid and placoid scales) produced by odontobasts.
组成牙或某些鳞片(鳞与盾鳞)中层坚。
enamel A shiny hard material covering the dentine of teeth and the surface of some scales (cosmoid and placoid scales).
珐琅有光泽坚包覆在牙及一些鳞片(圆鳞与盾鳞)表面。这是脊椎动所产生最坚。
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