Name the structures that regulate the temperature of the testes, and explain how they function to produce viable sperm. Ryan was asked to trace the path of the ductus deferens. This response—that it...

Name the structures that regulate the temperature of the testes, and explain how they function to produce viable sperm. Ryan was asked to trace the path of the ductus deferens. This response—that it runs from the scrotum directly up to the spongy urethra—was a common error, because the path of this duct is longer and more complex than he thought. (a) Trace the entire path of the ductus deferens. (b) To expand on part (a), trace the pathway of an ejaculated sperm from the epididymis all the way into the uterine tube in the female.