cell differentiation | male gamete generation | cellular process | chemical synaptic transmission | multicellular organismal reproductive process | gamete generation | reproduction | cell-cell signaling | reproductive process | multicellular organism development | synaptic signaling | cell communication | multicellular organism reproduction | anatomical structure development | signaling | developmental process | spermatogenesis | sexual reproduction | multicellular organismal process
cell | cytoplasm | intracellular | membrane