Prostate Anatomy & Biology

The prostate is a gland in the male reproductive system. It is located in front of the rectum and under the bladder. It is a walnut-size organ that surrounds the urethra, the tube that urine flows through. The prostate regulates both bladder control and normal sexual functioning. 

The role of the prostate is to make and store the seminal fluid, which carries the sperm out of the body during ejaculation. Male hormones from the testicles – including testosterone – make the prostate grow. If the prostate grows too large, it may squeeze the urethra which can slow or stop the flow of urine.