Bats and humans are both mammals and share a common ancestor. Because of this, a human arm and a bat wing have similar bone structure. In contrast, bird wings and bat wings have different structures. Explain these relationships in terms of homologous and analogous structures.

A great example of homologous structures are the wings of a bat and the arms of a human. Bats and humans are both mammals, so they share a common ancestry. Both a bat's wing and a human's arm share a similar internal bone structure, even though they look very different externally.

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