19 Sex differentiation

19 Sex differentiation - What is Meant by Development?...

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What is Meant by Development? Pro c e s s  that pro duc e s  fo rm  fro m  fo rm le s s  m as s . e .g .  fro m  s am e  s e xle s s  s ta rting  po int  ->  s e xual diffe re ntia tio n e .g .  fro m  fe rtilize d o vum  ->  diffe re nt ana to m ic a l re g io ns Pa tte rn o f c ha ng e  that o c c urs  thro ug ho ut life s pa n. *  influe nc e d by inte rac tio n o f m a tura tio n & e xpe rie nc e
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Phases of the Human Lifespan *  Em b ryo lo g ic a l (2 wks  – 3 m o s ) Ado le s c e nc e  (pube rty) *  Fe ta l (3 m o s  - b irth) Infa nc y S e ne s c e nc e Adultho o d Fe rtiliza tio n  -> Birth  -> De ath  -> De ve lo pm e nt is  c o ntinuo us  (g ra dual, c um ulative  c hang e ) o r dis c o ntinuo us   (a brupt, s e q ue nc e  o f s ta g e s  o r pha s e s ). Pre na ta l Ne o na ta l *  G e rm ina l (c o nc e ptio n - 2 wks ) Juve nility
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Developmental Trends C e pha lo c a uda l:  De ve lo pm e nt o c c urs  in are a s  ne a r the  he a d  tail) Proximodistal: (distal) later.  e.g internal genitalia first, then external genitalia.
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This note was uploaded on 05/31/2009 for the course BAA 171 taught by Professor Drea during the Fall '07 term at Duke.

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19 Sex differentiation - What is Meant by Development?...

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