For ten points, these are parts of what chestnut-sized gland surrounding the urethra, found beneath the bladder of men.
Its transition zone may develop benign hyperplasia, while the anterior fibromuscular stroma is the anchoring point of the urethral sphincter. The central zone features the connection of the seminal vesicles and the peripheral zone can be felt by a finger in the rectum.  For ten points, these are parts of what chestnut-sized gland surrounding the urethra, found beneath the bladder of men.
Its transition zone may develop benign hyperplasia, while the anterior fibromuscular stroma is the anchoring point of the urethral sphincter.
prostate gland