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Intratesticular ducts
Changes in epithelium help to differentiate the intratesticular passages in the testis as seen in this transition region from convoluted portions of the seminiferous tubule to the rete testis. Stratified germinal epithelium lines the convoluted portion of the seminiferous tubules; simple columnar epithelium (modified Sertoli cells) lines the short straight portions of the seminiferous tubules; and simple cuboidal epithelium lines the rete testis. 400x

Seminiferous tubules - Convoluted portions
Changes in epithelium help to differentiate the intratesticular passages in the testis as seen in this transition region from convoluted portions of the seminiferous tubule to the rete testis. Stratified germinal epithelium lines the convoluted portion of the seminiferous tubules; simple columnar epithelium (modified Sertoli cells) lines the short straight portions of the seminiferous tubules; and simple cuboidal epithelium lines the rete testis. 400x

Seminiferous tubules - Straight portions
Changes in epithelium help to differentiate the intratesticular passages in the testis as seen in this transition region from convoluted portions of the seminiferous tubule to the rete testis. Stratified germinal epithelium lines the convoluted portion of the seminiferous tubules; simple columnar epithelium (modified Sertoli cells) lines the short straight portions of the seminiferous tubules; and simple cuboidal epithelium lines the rete testis. 400x

Rete testis
Changes in epithelium help to differentiate the intratesticular passages in the testis as seen in this transition region from convoluted portions of the seminiferous tubule to the rete testis. Stratified germinal epithelium lines the convoluted portion of the seminiferous tubules; simple columnar epithelium (modified Sertoli cells) lines the short straight portions of the seminiferous tubules; and simple cuboidal epithelium lines the rete testis. 400x

Mediastinum
Changes in epithelium help to differentiate the intratesticular passages in the testis as seen in this transition region from convoluted portions of the seminiferous tubule to the rete testis. Stratified germinal epithelium lines the convoluted portion of the seminiferous tubules; simple columnar epithelium (modified Sertoli cells) lines the short straight portions of the seminiferous tubules; and simple cuboidal epithelium lines the rete testis. 400x

Image source >
Image taken of a slide in the University of Tasmania collection.