Male reproductive gland

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Male reproductive gland

  1. 1. MALE REPRODUCTIVE GLAND<br />By J9<br />
  2. 2. TESTES<br />Located in the scrotum<br />Secrete hormone known as androgen; most important of which is testosterone<br />Have an exocrine part, Seminiferous tubules (tightly coiled) and endocrine part, intersitial or Leydig cells (clusters)<br />
  3. 3. Leydig cells<br />Synthesise and secrete testosterone<br />Located in the interstitial tissue between the convulutedseminiferous tubules<br />Occurs in clusters, which are variable in size and richly supplied by capillaries<br />Its cytoplasm is strongly acidophilic and finely granular<br />The nucleus is large, round and often located eccentric in the cell<br />
  4. 4. General effects of the testosterone<br />Anabolic<br />Growth of muscle mass and strength<br />Increased bone density and strength<br />Linear growth<br />Bone maturation<br />
  5. 5. Androgenic (Virilizing)<br />Maturation of sex organs (part. Penis)<br />Formation of scrotum in the fetus<br />Deepening of voice (sec. sex charac.)<br />Growth of beard and axillary hair (sec. sex charac.)<br />
  6. 6. ...cont. testosterone<br />Testosterone increases sharply at puberty<br />Essential for the production of sperm<br />Production of testosterone is controlled by the release of luteinizing hormone (LH)<br />
  7. 7.
  8. 8. Sertoli cells<br />‘nurse’ cell of the testes<br />Part of the seminiferous tubule<br />Activated by follicle-stimulating hormone and has FSH-receptor on its membranes.<br />Estradiol and Inhibin – hormone secreted<br />
  9. 9. Estradiol<br />Prevent apoptosis (death of cells) of germ cells<br />Inhibin<br />Inhibit production of FSH<br />
  10. 10. Arrows shows the location of the leydig cells<br />
  11. 11. TESTIS<br />1 Lumen of Tubulusseminiferuscontortus2 spermatids3 spermatocytes4 spermatogonia5 Sertoli cell6 Myofibroblasts7 Leydig cells8 capillaries<br />

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