Prostate Model, 1/2 natural size This prostate model provides a cross section of the male genital organs showing a healthy prostate with bladder, urethra, testicle, symphysis and rectum. The narrowing of the urethra due to the change of the prostate is made clear via the 4 cross sectional views on the bass of the prostate model. The anatomical structures of the prostate model have simple schematic coloring. Prostate model on base.