The prostate is a part of the male reproductive system. It is located just below the bladder and in front of the rectum. It is about the size of a walnut and produces fluid that makes up a part of semen and controls the urine flow. As a man ages, the prostate tends to increase in size. This can cause the urethra to narrow and decrease urine flow. To know in detail about the role of the prostate and how it impacts the functioning in the body, watch this session by Dr. Varun Mittal, Sr. Consultant