Analogous organs are organs which are different in structure but similar in function .
example - the wings of  butterfly  , birds n bat..
they hv diffrnt structures but same function.
analogous structures show how different organisms hav evolved to become similar .
the presence of analogous structures does not mean that 2 species hav common ancestral orgin , but rather they are frm 2 separate branches of phylogenetic tree n are not close to each othr at all.
hope it helpd:)