这个词是什么意思？
Male germ cells derived from SPERMATOGONIA. The euploid primary spermatocytes undergo MEIOSIS and give rise to the haploid secondary spermatocytes which in turn give rise to SPERMATIDS.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D013090 · MeSH 2026。
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