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HOMOLOGNI IN ANALOGNI ORGANI

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hana grum

on 18 April 2016

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Transcript of HOMOLOGNI IN ANALOGNI ORGANI

HOMOLOGNI IN ANALOGNI ORGANI
ENAK IZVOR
Različne naloge
Kaj so homologni organi?
-organi, ki na zunaj ne kažejo podobnosti, vendar imajo skupen izvor
-ker se uporabljajo za različne namene so se vizualno spremenili
-krila ptic so homologna, s prednjimi udi plazilcev

PRIMERI HOMOLOGNIH
ORGANOV
RAZLIČEN VIDEZ
ANALOGNI ORGANI
-to so organi, ki imajo različen izvor
-zaradi opravljanja podobnih nalog imajo podoben videz
PRIMERI ANalognih
organov
-sprednji nogi krta in bramorja

RAZLIČEN IZVOR
PODOBNE NALOGE
PODOBEN VIDEZ
-krila netopirja so analogna krilom metulja
-krilo ptice in krilo žuželke
-pri grahu (preobražen list) in vinski trti (preobraženo steblo)
humerus-nadlahtnica
radius-koželjnica
ulna-podlahtnica
carpals-zapestje
Full transcript