Question

make the connection: your heart is dependent on oxygen from your respiratory system, and it is delivered by the (1 point)

nervous system.
muscular system.
respiratory system.
circulatory system.

Explanation:

The circulatory system, which includes the heart and blood - vessels, is responsible for transporting oxygen (picked up by the respiratory system) to the body's tissues. The nervous system controls and coordinates body functions but does not directly deliver oxygen. The muscular system provides movement and support but is not the oxygen - delivering system. The respiratory system takes in oxygen but does not distribute it throughout the body; that is the job of the circulatory system.

Answer:

D. circulatory system