PLATE IX.

Fig. 20. Normal structure of epididymis tubule. × 140.

Fig. 21. Epididymis tubule showing exfoliation of the lining

membrane, and cellular debris in the lumen. × 140.

Fig. 22. Atrophy and degeneration of epididymis tubule. The

interstitial connective tissue is much increased in

amount. × 140.

Fig. 23. Same, but in more advanced stage. × 140.

A study of some factors influencing fertility and sterility in the bull · 第 33 / 38 题