$(a)$ Trace the path of sperms from where they are produced in the human body to the exterior.
$(b)$ Write the functions of secretions of the prostate gland and seminal vesicles in humans.

(N/A) The path of sperm is as follows: $\text{Testes} \rightarrow \text{Epididymis} \rightarrow \text{Vas deferens} \rightarrow \text{Ejaculatory duct} \rightarrow \text{Urethra} \rightarrow \text{Exterior}$.
$(b)$ The secretions of the prostate gland and seminal vesicles provide a fluid medium for the sperm,which makes their transport easier. Additionally,these secretions provide nutrition to the sperm and contain enzymes that help in the activation and survival of the sperm.