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.
上外侧软骨尾端与外侧脚的头侧端相交处为软骨间交界区。
Caudally the junction of the upper lateral cartilages with the cephalic edge of the lateral crus defines the scroll area.
软骨功表演者可以把她的脚放在头后面。
不断发现的影响还包括头小；中央神经系统基因改变；有助于构成头盖骨的细胞的死亡率提高；以及畸形软骨。
Effects repeatedly found included reduced head size, genetic alterations in the central nervous system, increase in the death of cells that help form the skull, and deformed cartilage.
不断发现的影响还包括头小；中央神经系统基因改变；有助于构成头盖骨的细胞的死亡率提高；以及畸形软骨。
Effects repeatedly found included reduced head size, genetic alterations in the central nervous system, increase in the death of cells that help form the skull, and deformed cartilage.
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