The tall columnar cells are modified on their luminal surface by extremely long microvilli which are known as stereocilia. However, these projections are not motile, they increase the surface area for absorption of the testicular fluid. There is a profuse vascular plexus in the loose connective tissue which surrounds the duct of the epididymis to carry the fluid into the circulation. Spermatozoa are not visible in this preparation of the body of the epididymis. Spermatozoa are stored mianly in the tail of the epididymis.