Homologous Structures or Organs: The structure which are similar in their morphology, anatomy, genetics and embryology but dissimilar in their functions are called homologous structures.

homologous structure

These structures are inherited from a common ancestor; they have similar developmental pattern in the embryos; they have the same type of bones, blood vessels, nerves, muscles etc. but they have do dissimilar functions in different animals. The relationship  between homologous structures is called homology.

Analogous structures: Sometimes animals belonging to different group live in the same habitat. Hence they lead a similar type of life. This leads to the development of superficially similar structures to lead a similar way of life. As these animals belong to different groups, anatomically the structures are different. The structures are which are superficially similar but anatomically dissimilar doing similar functions called analogous structures.

Analogous structures

Homologous structures vs Analogous structures

Similar in anatomy
Dissimilar in anatomy
Doing dissimilar functions
Doing similar functions
Develop in related animals
Develop in unrelated animals
Inherited from a common ancestor
Not inherited from common ancestor
Similar developmental pattern
Developmental pattern is not similar
Similar structure and Origin
Dissimilar in structure and origin
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