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REPRODUCTIVE PHYSIOLOGY OF MALE (FUNCTIONAL ANATOMY (Consists of many…

- - - - scrotum: skin pouch with a subcutaneous fibroelastic and muscular which provides a countercurrent heat exchange mechanism for testicular thermoregulation
      - testis: responsible for steroidogenesis (production of androgens) and spermatogenesis
        
        Interstitial tissue compartment
        
        Leydig cells
        
        seminiferous tubule
        
        Sertoli cells:provide support and nourishment to the developing germ cells
        
        basal compartment
        
        contains spermatogonia
        
        adluminal compartment
        
        represents a special environment for spermatocytes undergo meiosis and continue meiotic divisions
      - Epididymis: conduit spermatozoa and provides a special environment in which spertazoa are concentrated, undergo maturation and acquire fertilizing capacity
      - deferens ducts:transport sperm from the epididymis to the ejaculatory ducts in anticipation of ejaculation.
      - penis: copulatory organ
- - - - i. Mitotic division of type A spermatogonia to maintain population of stem cells
        
        ii. Type A spermatogonia becomes type B
        
        iii. Further mitosis to produce primary spermatocytes
        
        iv. Primary spermatocytes enter the pool of meiotically dividing cells and ultimately produce spermatozoa
    - - i. homologous chromosomes segregate into two resulting cells, creating a haploid condition.
        
        ii. The resultant haploid cells are the secondary spermatocytes with duplicated chromatids
    - - the newly formed spermatids continue to differentiate without dividing to form mature spermatids
- - - - Synthesize and secretes the decapeptide gonadotropin-releasing hormone (GnRH)
        
        GnRH acts directly on gonadotropic cells in the anterior pituitary