Human Reproduction PPT Biology Class 12

 Page 1


Chapter ; 03
HUMAN REPRODUCTION 
Page 2


Chapter ; 03
HUMAN REPRODUCTION 
THE MALE REPRODUCTIVE SYSTEM.
? Located in the pelvis region.
? Male reproductive system includes
? A pair of testes.
? Accessory ducts.
? Accessory glands.
? External genitalia
Page 3


Chapter ; 03
HUMAN REPRODUCTION 
THE MALE REPRODUCTIVE SYSTEM.
? Located in the pelvis region.
? Male reproductive system includes
? A pair of testes.
? Accessory ducts.
? Accessory glands.
? External genitalia
Testes:
? Located outside the abdominal cavity within a pouch called scrotum.
? Scrotum provides low temperature required for spermatogenesis.
? Each testis is about 4 to 5 cm length and 2 to 3 cm width.
? Each testis has about 250 compartments called testicular lobules.
? Each lobule contains one to three seminiferous tubules.
? Seminiferous tubules lined by male germ cells and Sertoli cells.
? Male germ cell undergoes meiosis and produce sperm.
? Sertoli cells provide nutrition to the germ cell and the sperm.
? In between the seminiferous tubule there is interstitial cell or Leydig  
cell.
? Leydig cells produce testicular hormones
called androgen (testosterone).
Page 4


Chapter ; 03
HUMAN REPRODUCTION 
THE MALE REPRODUCTIVE SYSTEM.
? Located in the pelvis region.
? Male reproductive system includes
? A pair of testes.
? Accessory ducts.
? Accessory glands.
? External genitalia
Testes:
? Located outside the abdominal cavity within a pouch called scrotum.
? Scrotum provides low temperature required for spermatogenesis.
? Each testis is about 4 to 5 cm length and 2 to 3 cm width.
? Each testis has about 250 compartments called testicular lobules.
? Each lobule contains one to three seminiferous tubules.
? Seminiferous tubules lined by male germ cells and Sertoli cells.
? Male germ cell undergoes meiosis and produce sperm.
? Sertoli cells provide nutrition to the germ cell and the sperm.
? In between the seminiferous tubule there is interstitial cell or Leydig  
cell.
? Leydig cells produce testicular hormones
called androgen (testosterone).
Accessory ducts:
? Includes rete testis, vasa efferentia, epididymis and vas  
deferens.
? Seminiferous tubules open into vasa efferentia through rete
testis.
? The vasa efferentia leaves the testis and open into epididymis.
? The epididymis leads to vas deferens that ascends to the  
abdomen through inguinal canal and loops over the urinary  
bladder .
? Vas deferens receives a duct from seminal vesicle and opens  
into the urethra as the ejaculatory duct.
? Urethra originates from the urinary bladder and extends
through the penis to its external opening calledurethral
meatus.
Page 5


Chapter ; 03
HUMAN REPRODUCTION 
THE MALE REPRODUCTIVE SYSTEM.
? Located in the pelvis region.
? Male reproductive system includes
? A pair of testes.
? Accessory ducts.
? Accessory glands.
? External genitalia
Testes:
? Located outside the abdominal cavity within a pouch called scrotum.
? Scrotum provides low temperature required for spermatogenesis.
? Each testis is about 4 to 5 cm length and 2 to 3 cm width.
? Each testis has about 250 compartments called testicular lobules.
? Each lobule contains one to three seminiferous tubules.
? Seminiferous tubules lined by male germ cells and Sertoli cells.
? Male germ cell undergoes meiosis and produce sperm.
? Sertoli cells provide nutrition to the germ cell and the sperm.
? In between the seminiferous tubule there is interstitial cell or Leydig  
cell.
? Leydig cells produce testicular hormones
called androgen (testosterone).
Accessory ducts:
? Includes rete testis, vasa efferentia, epididymis and vas  
deferens.
? Seminiferous tubules open into vasa efferentia through rete
testis.
? The vasa efferentia leaves the testis and open into epididymis.
? The epididymis leads to vas deferens that ascends to the  
abdomen through inguinal canal and loops over the urinary  
bladder .
? Vas deferens receives a duct from seminal vesicle and opens  
into the urethra as the ejaculatory duct.
? Urethra originates from the urinary bladder and extends
through the penis to its external opening calledurethral
meatus.
Accessory glands:
? Includes
? Paired seminal vesicle
? A prostate gland
? Paired bulbourethral gland.
? Secretion of these glands constitutes the seminal
plasma.
? Seminal plasma rich in fructose, calcium, and  
certain enzyme.
? Secretion of bulbo-urethral glands helps in
lubrication of penis.