The male reproductive gland through which the ejaculatory ducts and urethra pass is called the if this gland enlarges or becomes cancerous, the urethra may narrow, making urination difficult.

Prostrate gland

Explanation:

Prostrate gland is the part of male reproductive system. It is present at the base of the bladder. It produce the fluid which comes as seminal vesicles through ejaculatory ducts finally to the urethra. The urethra is a tube which runs through prostrate gland. In case of cancer, the imflammation of prostrate takes place. As a result of this urethra tube becomes narrow and restricts the flow of urine.

the ileocecal valve (also called bauhin valve), which limits the rate of food passage into the cecum and may prevent material from returning to the small intestine.