Describe the gross structure and main functions of all major body systems (P5)

Reproductive systems
Male

(Harvard-wm.org, 2014)

The male reproductive system is made up of the scrotum, testes, epididymis, spermatic cords, vas deferens, seminal vesicles, ejaculatory duct, urethra, prostate, cowper glands, the penis and the semen.
The scrotum is a sac like structure in which the testes are located, it is found in the pubic region and its job is to regulate the temperature of sperm by relaxing when the testes become too warm and contracting when the testes cold to move them closer to the heat of the body.
The testes which are located in the scrotum are secured at either end by a structure called the spermatic cord. These are twin oval, grape sized organs which have the function of secreting testosterone which is a male hormone vital for libido, muscle strength and bone density. Within the testes, there are coiled structures called sminiferious tubules which provide the role of producing sperm cells. Lying at the back of each testicle is the epididymis, which is a long tube that transports and stores sperm cells produced by the testes.
Connecting to the epididymis is the vas deferens which is a long muscular tube that extends into the pelvic cavity, to just behind the bladder. Its function is to transports mature sperm to the urethra, ready for ejaculation.
Attached to the vas deferens, near the base of the bladder, is the seminal vesicles which are sac like structures that provide the role of producing fructose that gives sperm a source of energy to aid movement. The fluid of the seminal vesicles makes up most of the volume of a man's ejaculatory fluid. The seminal vesicles fuse with the vas deferens to form ejaculatory ducts which empty into the urethra.
The urethra is the tube that carries urine from the bladder to outside of the body; it