sperm cell

sperm cell cytoplasm healthcare follicle call human fertilization egg nucleus fertilized polar body cortical granules contraception medical egg sexual seed macro follicle health education microscope embryogenesis spermatozoid pregnant gametes spermatogonia anatomical microscopic white background spermatogonium haploid reproductive cells seminiferous gamete spermatid system centriole spermatogenesis synthesis testosterone zygote infertile gene insemination conception fertilize life head sex evolution infertility reproduction diagram structure sperm medicine acrosome genetic human vector fertile anatomy semen science reproductive pregnancy biology spermatozoon fertility male spermatocyte gametogenesis graphic flagellum spermatozoa ovulation procreation