Cue Column | Notes Column
| Cue | Notes |
|---|---|
| Testis location | Scrotum — 2–3°C below body temp (optimal for spermatogenesis ~35°C) |
| Testis internal structure | ~250 lobules; each with 1–3 seminiferous tubules |
| Sertoli cells | Inside seminiferous tubules; sustentacular cells; nourish/support developing sperm; form blood-testis barrier; secrete inhibin |
| Leydig cells | In interstitial spaces (between tubules); secrete testosterone; stimulated by LH |
| Accessory glands | Seminal vesicles → fructose (60% semen); Prostate → alkaline (30%); Bulbourethral → lubrication |
| Accessory ducts | Rete testis → efferent ducts → epididymis → vas deferens → ejaculatory duct → urethra |
Summary
The testis has a dual function: (1) spermatogenesis (Sertoli cells + germ cells in seminiferous tubules) and (2) testosterone secretion (Leydig cells in interstitial spaces).
