Male Reproductive System

• The penis consists of the root (which is attached to the lower abdominal structures and pelvic bones), the visible part of the shaft, and the glans penis (the cone-shaped end).
• The base of the glans penis is called the corona.
• The scrotum is the thick-skinned sac that surrounds and protects the testes,
• The scrotum also acts as a climate-control system for the testes
• The testes are oval bodies that average about 1.5 to 3 inches (4 to 7 centimeters) in length
• The testes have two primary functions:

  • Producing sperm (which carry the man's genes)
  • Producing testosterone (the primary male sex hormone)
• The epididymis collects sperm from the testis and provides the environment for sperm to mature and acquire the ability to move through the female reproductive system and fertilize an ovum. 
• The vas deferens is a firm tube (the size of a strand of spaghetti) that transports sperm from the epididymis.
• The urethra serves a dual function in males. This channel is the part of the urinary tract that transports urine from the bladder and the part of the reproductive system through which semen is ejaculated.
•     The prostate lies just under the bladder and surrounds the urethra. Walnut-sized in young men, the prostate enlarges with age.