不经过软骨雏型，而直接从膜状结缔组织骨化为骨的一种骨，如一些头胪骨。

A bone that forms directly in membranous connective tissue, as some cranial bones, instead of developing from cartilage.

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不经过软骨雏型，而直接从膜状结缔组织骨化为骨的一种骨，如一些头胪骨。

A bone that forms directly in membranous connective tissue, as some cranial bones, instead of developing from cartilage.

youdao