‘I knew there was something in my body called a prostate but I knew nothing about it beyond that. I didn’t even know what it did.’

Only men have a prostate. Knowing what the prostate is, and where it is in the body, can help you better understand prostate cancer.

The prostate gland is part of the male reproductive system. It sits below the bladder and in front of the rectum. It surrounds the urethra, the passage through which urine and semen pass.

The prostate gland produces most of the fluid that makes up semen, which enriches and protects sperm. The prostate needs the male hormone testosterone to grow and develop. Testosterone is made in the testicles.

The prostate is often described as the size of a walnut and it is normal for it to grow as men get older. Sometimes this can cause problems, such as difficulty with urinating. These problems are common in older men and are not always symptoms or signs of cancer.

The male reproductive system
(where the prostate is)