Final answer:
The prostate gland is a crucial part of the male reproductive system responsible for secreting fluid that forms part of the semen. Prostate cancer represents a common tumor within this gland, affecting a significant percentage of men as they age.
Step-by-step explanation:
The prostate gland is a key component of the male reproductive system, specifically found in males. It performs a crucial function by secreting a fluid that is a part of semen. This fluid provides nourishment and helps in the motility of sperm. The prostate is a walnut-sized gland located at the base of the bladder, just anterior to the rectum and encircling the urethra at the point where it joins with the ejaculatory ducts. It secretes a slightly alkaline, milky fluid that contributes significantly to semen, helping to coagulate and then decoagulate the semen following ejaculation.
Regarding prostate cancer, it is a type of tumor that develops in this gland. It is considered the most common cancer in men and a leading cause of cancer-related death in individuals with a prostate. A large percentage of these individuals may develop cancerous cells in their prostate gland by the age of 80 in the United States.
Therefore, the correct answer to the question is C) A gland found in the male reproductive system.