The correct answer to this question is Prostate Gland. This gland has a size that is similar to that of a walnut. It is located around the bladder and urethra. As the name suggests, it is glandular, but it is also muscular. There are three lobes that make up the prostate gland. The first is a center lobe. The other two are lobes on each side of the center lobe.
This gland has a number of important features. One is that it is responsible for secreting alkaline fluid. This fluid is helpful in creating semen. Overall, it is important for the reproductive system of the male.