Table 12-6.
Testicular parameters in normal adult testes (means ± SD)
| Values per cross-sectioned tubule | Means ± SD |
|---|---|
| Seminiferous Tubules | |
| Mean tubular diameter (μm) | 193 ± 8 |
| Number of spermatogonia | 21 ± 4 |
| Number of primary spermatocytes | 31 ± 6 |
| Number of young (Sa + Sb) spermatids | 37 ± 7 |
| Number of mature (Sc + Sd) spermatids | 25 ± 4 |
| Number of Sertoli cells | 10.4 ± 2 |
| Number of Sertoli cell vacuoles | 0.8 ± 0.3 |
| Lamina propria thickness (μm) | 5.3 ± 1 |
| Number of peritubular cells | 21 ± 4 |
| Testicular Interstitium | |
| Number of Leydig cell clusters per tubule | 1.2 ± 0.3 |
| Number of Leydig cells per tubule | 5 ± 0.2 |