MICROSCAPE / SCIENCE PHOTO LIBRARY MICROSCAPE / SCIENCE PHOTO LIBRARY
Light microscopy of a seminiferous tubule in the testis showing full normal spermatogenesis. The immature germ cells (spermatogonia and spermatocytes) are at the margin of the tubule and progressively more mature germ cells form layers towards the central lumen which contains fluid. The cell nuclei (pale, rounded) and dense circular and curved acrosomes of developing sperm (guinea pig) are held in columns of Sertoli cell cytoplasm. Sertoli cell nuclei with a single dense nucleolus are found at the base of the epithelium (upper central margin). Magnification x800 when printed at 10 cm.
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