A boy was riding a horse for the first time. The horse ran more quickly than he expected, and he fell off, hitting his head on a rock.
A doctor’s exam revealed that he was okay, except for a few scrapes. What protected his brain from injury?
his spine, which lines the vertebral cavity
his skull, which encloses the cranial cavity
his abdominal cavity, which is filled with liquid
his spinal cord, which sends the brain messages
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A boy was riding a horse for the first time. The horse ran more quickly than he expected, and he fel...
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