The feature of some structures of male reproductive system is given below. Identify the structure on the basis of the characteristics which surrounds the primary sex organ of male reproductive system. (a) It is responsible for maintaining the low temperature by about 2 2.5° C from normal body temperature to mature sperm. (b) It travels through the penis and carry semen as well as urine. (c) Its enlarged end is called glans penis. (d) Stores sperms prior to ejaculation.