USMLE

Testes

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Reproductive
  1. Follicular Phase
  2. Luteal Phase
  3. Ovulation
  4. Spermatogenesis
  5. Sperm Structure
  6. Testes
  7. Epididymis

Summary

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Key Points

  • Testes
    • Produces sperm (Spermatogenesis)
      • Occurs at seminiferous tubules
        • Set of long, twisted tubules in the testes
        • Lined with Sertoli cells
          • Sertoli cells provide nourishment to sperm and regulate their development
        • Millions of sperm are produced every day
      • Stimulated by FSH (from anterior pituitary)
        • Also by testosterone to a lesser extent
      • Secretes inhibin
        • Works to inhibit FSH secretion, creating a negative feedback loop
    • Produces testosterone
      • Occurs at Leydig cells
      • Stimulated by LH (from anterior pituitary)