the circulaatory and respitortory system wor together to provide cells with oxygen and nutrients and remove waste products such as cabon dioxide. when u need more oxygen, how does the circulatory system respond?

Your circulatory system consists of your heart, blood vessels and blood, and is responsible for transporting life-giving oxygen throughout your body. When you exercise, your body's need for oxygen increases; the harder you work out, the more oxygen your body demands.