Part 10

Fig. 11. Same as Fig. 10. High power.

PLATE VII.

Fig. 12. Testicular tubule showing normal spermatogenesis. × 230.

Fig. 13. Testicular tubule showing no evidence of mitosis. × 230.

Fig. 14. Testicular tubule. The spermatogenic epithelium is beginning to degenerate and become cast off into the lumen. × 230.

Fig. 15. Testicular tubule, showing almost total exfoliation of the spermatogenic epithelium. × 230.

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.

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.

PLATE X.

Fig. 24. About the same as Fig. 22. × 140.

Fig. 25. Marked degeneration of epididymis tubule. There is a cellular infiltration of the interstitial tissue. × 60.

PLATE XI.

Fig. 26. Spermatozoon, showing constriction at middle of head. The head is also somewhat contorted. × 670.

Fig. 27. Spermatozoon. Pear shaped head. × 670.

Fig. 28. Spermatozoon. The head is quite long, and pointed at its posterior end. × 670.

Fig. 29. Spermatozoon, showing a constriction at middle of the head. × 670.

PLATE XII.

Fig. 30. Microcephalic spermatozoon. × 670.

Fig. 31. Spermatozoon. The head is small, and pear shaped. × 670.

Fig. 32. Macrocephalic sperm. The middle piece is much thickened. × 670.