A hard organ inside an animal's body that supports the body and serves as an attachment point for muscles. It is well developed in vertebrates. It also includes bone fragments in sponges, sea cucumbers, and corals. ⇔Exoskeleton. Source: About Shogakukan Digital Daijisen Information | Legend |
動物の体内にあって、体を支え、筋肉の付着点となる硬い器官。脊椎動物でよく発達。海綿類やナマコ・サンゴなどの骨片も含めていう。⇔外骨格。
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