Fig. 5. Gross anatomy of male reproductive organs and analysis of testis cross-sections of adult Hsf2^+/+ (+/+) and Hsf2^–/– mice (–/–). (A) Testis and epididymis size. T, testis; Eh, head of epididymis; Et, tail of epididymis; Ad, adipose tissues. (B) Cross-sections from testes. For (+/+): arrowhead, elongating spermatids; short arrow, spermatocytes; long arrow, spermatogonia. For (–/–): reduction in the diameter of the seminiferous tubules and indications of disruption of spermatogenesis. For inset: lack of spermatocytes (short arrow) and spermatids (arrowhead), vacuolization of the tubules (asterisk). Bars = 100 µm.