Distinguish between homologous and analogous organs.

Homologous organs :
* Organs which have similiar structure and origin but may or may not have same function are called homologous organs.
Eg : The flippers of whale, wings of bat, hand of man.
Analogous organs :
* Organs which have different structure and origin but perform the same function are called analogous organs.
Eg : Wings of a bird and wings of a insect.