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Respiratory system - helps you breathe. You inhale oxygen, and exhale carbon dioxide. Nose -> Nasal passages -> Trachea -> Bronchi -> Bronchioles -> Alveoli.

Circulatory system - a system that your heart pumps. Blood circulates is and transport system through the body.
3 Major Parts of the Circulatory System
1- Heart - pumps blood throughout the body
2-Blood vessel- carries blood throughout the body. these are the three parts :
        c) Cappillaries
3-Blood - carries the materials throughout the body

Upper chamber - Atria/Atrium
Lower chamber - Ventricles
Blood- deliver nutrients oxygen and other chemicals
Oxygen- process the nutrients in the cell to make energy
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