PLATE VIII.

Fig. 16. Testicular tubule. The seminal epithelium is entirely

degenerated. The membrana propria is markedly thickened.

× 230.

Fig. 17. Testicular tubule. The tubule is undergoing atrophy and

degeneration. The interstitial connective tissue is much

increased in amount. × 230.

Fig. 18. Same as Fig. 17, except that it is in the more advanced

stages.

Fig. 19. Testicular tubule. The spermatogenic epithelium has

undergone a sort of hydropic degeneration. The

interstitial connective tissue has become much increased

in amount and has undergone cellular infiltration.

A study of some factors influencing fertility and sterility in the bull · 第 32 / 38 题