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Skylar sprinted around the track at her school. At the end of her run, she was taking more air into her lungs and her heart rate had increased. What systems regulate Anita’s breathing rate and heart rate?
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Skylar sprinted around the track at her school. At the end of her run, she was taking more air into her lungs and her heart rate had increased. What systems regulate Anita’s breathing rate and heart rate?

User Meistermeier
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The cardiovascular system
User Sultanmyrza
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