Warm- blooded animals tend to have highly vascularized bone tissue. Cold-blooded animals,on the other hand,have relatively dense bone,sometimes even showing annual growth rings.

 
  • 温血动物通常具有密布血管的骨骼组织,而冷血动物则有着相当厚的骨骼组织,有时甚至有每年生长的环带。
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