microscopy photography. testis, seminiferous tubules, cross sect

anatomy animal background biology cell cross education epithelium fertility germinal gland health healthcare histological histology human light macro magnification male medical micro micrograph microscope microscopic microscopical microscopy organic photography photomicrograph pink reproduction reproductive research science secciasup3 section seminiferous spermatocyte spermatocytes spermatogenesis spermatogonia spermatozoa system technology testicle testicular testis tissue tubule tubules