讨论:analogous organ

what da hell is it?

参看：同功器官

1. Homologous organs- organs similar in form in different organisms owing to a common evolutionary origin- example- same bone structure of bat's wing, dolphin's flipper, human's arm, bird's wing
2. Analogous organs- organs that have similar functions in different organisms (do not share a common evolutionary origin)- lungs of mammals and trachea of insects; wings of insects and wings of birds
3. Vestigial organs- organs or parts of organs that are nonfunctional and degenerate- wingless birds with vestigial wing bones, whales and pythons with vestigial hind leg bones; blind cave-dwelling animals with vestigial eyes
   --Shibo77 06:07 2006年5月12日 (UTC)

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