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Male reproductive system Anatomy and physiology

Male reproductive system Anatomy and physiology. Kristina Njerš Mentor: A. Žmegač Horvat. Male reproducitve system,anatomy(MRSA). Seminal vesicle. Prostate gland. Bulbourethral (Cowper`s) gland. Ejaculatory duct. Vas (ductus) deferens. Urethra. Epididymis. Testis, Scrotum. Penis.

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Male reproductive system Anatomy and physiology

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  1. Male reproductive systemAnatomy and physiology Kristina Njerš Mentor: A. Žmegač Horvat

  2. Male reproducitve system,anatomy(MRSA) Seminal vesicle Prostate gland Bulbourethral (Cowper`s) gland Ejaculatory duct Vas (ductus) deferens Urethra Epididymis Testis, Scrotum Penis

  3. Functions of the MRS: 1. Production, retention and transport of semen 2. Production and secretion of testosterone 3. Ejaculation - sperm discharge during intercourse

  4. Testis - in scrotum (27 degrees C) -seminiferous tubules - germ cells - spermatogenesis -Sertoli cells -interstitial cells - Leydig cells - testosterone

  5. Spermatogenesis (3 major parts) mitosis- the multiplication of spermatogonia meiosis- reduction of chromosome number from diploid to haploid spermiogenesis-transformation of spermatid into the spermatozoon Spermatozoa or sperms are first produced at puberty, spermatogenic activity is maintained into old age

  6. The tail Mitochondria - motility Spermatozoon(sperm cell) The head Acrosome - enzyme activity

  7. Sertoli cells • secretory and structural support to the germ cells (spermatogenesis) • create a blood-testis barrier

  8. Endocrinology of male reproduction

  9. Epididymis - upon lateral edge of posterior border of the testis - caput, corpus, cauda - spermatozoa conduit and reservoir - spematozoon gets motilily and fertilizing capacity Vas deferens - in the spermatic cord - scrotal, inguinal, retroperitoneal portions - peristaltic contractions during ejaculation Spermatic cord - connective tissue sheath - contains - ductus deferens, - testicular blood vessels - nerves

  10. Seminal vesicles - posterior to the urinary bladder - alkaline secretion - enhances spermatozoic mobility - energy source (fructose) - most of the volume of ejaculated semen Ejaculatory duct - ductus deferens + seminalvesicleduct Prostate gland - encirclesupper end of urethra - muscular gland - smooth muscle contracts during ejaculation - secretion - helps motlity of sperm Bulbourethral glands (Cowper`s) - below the prostate - secretion - empty into urethra Semen-combination of fluid and spermatozoa (<1%)

  11. Penis - root - body - 3 circular-shaped chambers - sponge-like erectile tissue - vascular sinuses - vasodilatation - erection - glans penis - foreskin (prepuce) - circumcision - nerve endings

  12. Thank you! 

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