The narrow middle part of the epididymis is called:

The ejaculatory duct is formed by the union of which of the following?

The penile urethra runs through which of the following?

The path of sperm transport is given below. Provide the missing steps in blank boxes.
$\boxed{\text{Seminiferous tubules}} \to \boxed{\text{Rete testis}} \to \boxed{A} \to \boxed{\text{Epididymis}} \to \boxed{B} \to \boxed{\text{Urethra}}$

Sertoli cells are found in which place and what is their function?

Provide information about the reproductive accessory ducts in the male human reproductive system.