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Automatische Übersetzung:
Rat testis, light micrograph. Cross-section of a seminiferous tubule, lined by a seminiferous epithelium where spermatogonia and Sertoli cells are located at the base, primary spermatocytes in pachytene of prophase I of the first meiotic division occupy an intermediate position, and spermatids with elongated nuclei are found near the lumen. 0.5 micrometre thick section of plastic embedded material stained with toluidine blue.