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science
Question | Answer |
---|---|
bird | endothermic vertebrate that has feathers and a four chambered heart |
contour feather | is one of the large feathers that give shape to a birds body |
down feather | are specialized to trap heat and keep the bird warm |
crop | storing food inside the body after swallowing it |
gizzard | squeezes and grinds the particulary digested food |
lift | the force that causes the bird to go up when it flies |