The Male Reproductive Tract
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In this image, the muscles of the penis (A) are more clearly dissected out. The specimen is on its right side with the head facing up and to the left. Once again, the ischiocavernosus muscle (B) arises from the ischium and surrounds the crus and corpus cavernosum; The bulbospongiosus muscle (C) surrounds the bulbs of the penis and corpus spongiosum; Finally, there is a pair of thin strap muscles which course along the caudoventral surface of the penis, the retractor penis muscles (D).