b) Compare the skeletal system of humans and birds.
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Explanation:
The main difference between the human and bird skeleton is that the bird's skeleton is adapted for flight.
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The human skeleton system consists of all of the bones, cartilage, tendons and ligaments in the body. All together the skeleton system makes up about 20 percent of a person's body weight. An adult's skeleton contains 206 bones
Birds have a lightweight skeleton made of mostly thin and hollow bones. the keel-shaped sternum(breastbone)is where the powerful flight muscles attach to the body. Birds have a smaller total number of bones
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