Reproductive system

• The male reproductive organs include the penis, scrotum, testes, epididymis, vas deferens, seminal vesicles, prostate gland, bulbourethral glands, urethra, and accessory ducts.
• Sperm cells are produced by spermatogenesis in the seminiferous tubules within the testes.
• Testosterone is secreted by Leydig's cells in response to LH from the anterior pituitary.
• Testosterone is secreted by Leydig's cells in the interstitial tissue between the seminiferous tubules.
• FSH stimulates Sertoli cells to produce inhibin, which regulates FSH levels.
• FSH stimulates Sertoli cells to produce inhibin, which inhibits FSH production.
• LH stimulates Leydig cells to secrete testosterone, which inhibits LH production.
• FSH stimulates Sertoli cells to produce inhibin, which inhibits FSH release.
• Leydig cells secrete testosterone, which stimulates the production of spermatozoa (sperm) in the seminiferous tubules.
• Inhibin inhibits the release of FSH from the anterior pituitary.
• The hypothalamus secretes GnRH into the bloodstream, which travels to the anterior pituitary gland.
• Testosterone is produced by Leydig cells in response to LH stimulation.