Testis Development Movie

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Testis and Ductus Deferens Development This animation shows the process of early testis and ductus deferens (vas deferens) development. The paramesonephric duct (red, left) degenerates under the influence of Mullerian duct inhibitory factor (MDIF) secreted by sertoli cells (differentiated by SRY expression). The mesonephric duct (purple) differentiates under the influence of Testosterone secreted by Leydig cells. Within the testes these mesonephric tubules grow towards the medullary sex cords and will form the rete teste. The mesonephric duct extending out of the gonad forms the ductus deferens. The medullary sex cords (orange) form testis cords. these later differentiate into solid seminiferous tubules that during puberty become hollow and actively produce spermatozoa. The surrounding connective tissue (pink) differentiates to form stromal cells. The tunica albuginea (white) covers the testis and bands extend inward to form connective tissue septa. Compare this animation with that for ovary development animation. Embryonically, both gonads (testis and ovary) and internal genital tracts (ductus deferens and uterus) begin with the same basic elements that have divergent pathways under the initial influence of the sex chromosomes (Y and X). Genital Movie Links Female: Ovary Development | MP4 version | Quicktime version | External | MP4 version | Quicktime version | Uterus Development | Vagina Development | MP4 version | Quicktime version Male: Testis Development | MP4 version | Quicktime version | External | MP4 version | Quicktime version | Testis Development | Testis Descent | MP4 movie | Quicktime movie |

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Dr Mark Hill 2013, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G