Typical rough endoplasmic reticulum ( RER) were not seen during the process of spermatogenesis, only vesicular RER appeared and smooth endoplasmic reticulum ( SER) only presented at spermatogonium stage. 部分溶酶体构成精子顶体的一部分.精子发生的全过程中,未见典型的粗面内质网(RER),仅见泡状粗面内质网(VRER);