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HUMAN REPRODUCTION

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Page 1: HUMAN&REPRODUCTION& · Fer;lisaon : the&acrosome&recognizes&the& human&female&membrane&and&breaks&it&down&

HUMAN  REPRODUCTION  

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Human  chromosomes:  caryo;pe  

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A  chromosome:  DNA  (genes)  and  proteins  

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The  male  reproduc;ve  system  

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Male  rep  system:  a  front  view  

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The  female  reproduc;ve  system  

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The  female  R.  S:  a  front  view  

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Gametogenesis  

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Gametogenesis  

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Gametogenesis:  growth,  meiosis,  matura;on  

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The  sperm  cell:  a  very  specialized  cell  

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 1.  membrane      2  ,  3,    4:  acosome      5:  nucleus        6  and  7  :  centrioles        8    9    ,    10    11      12:    

fibers      9:  mitochondrion  A:    head        B    and    C  :  midpiece      D  and  E:  tail,  flagellum          

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The  ovum  or  egg  cell  

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A  human  egg  cell  

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Ovum  and  sperm  cells  

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The  ovarian  cycle  

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1  to    6:  Follicular  phase,  it  lasts  14  days,  s;mulated  by  FSH    

6:  ovula;on,  s;mulated  by  LH;    body  temperature  increases  8      to  9  :    Lutela  phase,    progesterone  increases.  It  ends  with  pregnancy  or  

menstrua;on.  

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The  menstrual  cycle  

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The  menstrual  cycle  

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The  menstrual  cycle  

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Fer;lisa;on:  the  acrosome  recognizes  the  human  female  membrane  and  breaks  it  down  

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Fer;lisa;on:  just  male  nucleus  goes  into  the  ovum,  a  barrier  forms  around  the  ovum  

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A  fer;lized  egg:  2  nuclei  are  joined  together:  a  zygote  is  formed  

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Cleavage:  first  week  of  gesta;on:  morula  is  produced  by  mitosis,  cells  divide  and  blastula,  gastrula  

and  embryo  develops  

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Fer;lisa;on  to  implanta;on  

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FIV  techniques  

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Vitro  fer;liza;on  

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Stages  to  an  embryo  

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Foetus,  placenta  end  pregnancy  

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Labour  and  birth:  dilata;on  of  cervix,    foetal  expulsion  and  delivery  of  the  placenta  

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What  can  you  recognize?:  

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