Question

Make the connection: your heart is dependent on oxygen from your respiratory system, and it is delivered by the (1 point)
• nervous system.
• circulatory system.
• muscular system.
• respiratory system.

Answer 1

The correct answer is the **circulatory system**. The heart pumps oxygen-rich blood from the lungs (where oxygen is transferred from the respiratory system) to the rest of the body through the circulatory system.