The muscles in the scrotum, called the cremasteric muscles, move the testicles slightly within the scrotum depending on the surrounding temperature.Once sperm are produced, they travel through a collection area, called the epididymis, and then through a tube or duct, called the vas deferens, which then joins the seminal vesicles to form the The prostate is a walnut-sized gland that lies below the urinary bladder and surrounds the urethra. What Is the Penis?The anatomy and the location of the male reproductive system.What Is the Prostate Gland? In men, the urethra provides a dual purpose, to transport urine from the bladder, and to transport the semen (sperm cells and fluid from the seminal vesicles and the prostate) out the tip of the penis. These two names, testes and testicles, are often used interchangeably even though their definitions are slightly different.The scrotum is a thin sac of skin and thin muscle in which lie the testicles. The abdomen (commonly called the belly) is the body space between the thorax (chest) and pelvis. Main pelvic bones vector illustration.. Vector. Along with the seminal vesicles, the prostate gland produces a fluid, called prostatic fluid, that contains, protects, nourishes, and supports the sperm. These elements reside in trillions of cells and non-cellular components of the body.