the end-piece of the sperm consists of the axoneme and its surrounding cytoplasm, and the axoneme has a typical "9 + 2" structure.
精子末段
及包绕
质膜组成，为典型"9+2"结
。
；鞭毛the end-piece of the sperm consists of the axoneme and its surrounding cytoplasm, and the axoneme has a typical "9 + 2" structure.
精子末段及包绕质膜组成，为典型"9+2"结。
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