Similarities between the bones of humans, birds and bats | ASU - Ask A Biologist

Similarities between the bones of humans, birds and bats | ASU - Ask A Biologist

Similarities between the bones of humans, birds and bats | ASU - Ask A Biologist

Comparison of bones of human, bird and bat

From the outside, human arms, a bird's wings and bat wings look very Different. Humans are covered with fur, birds are covered with feathers and bats are covered with hair. But in the interior there are many similarities between the arms of humans, birds and bats. Did you know that humans, birds and bats have exactly the same type and number of bones in their arms? These organs share the same arm bones because they all evolved from a common ancestor.

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The bones of the arm of humans, birds and bats include the humerus, ulna, radius, carpi, metacarpals and The phalanges. Can you recognize these bones in the following diagram?

While all these organisms have the same basic type of each bone, the bones have been modified to fulfill different functions. Humans use their arms to reach and lift objects, to bat with baseballs and to play the piano. The arms of the birds and the bats have evolved to wings, allowing them to fly. Can you find other differences and similarities between the arms of humans, birds and bats?