healthy body

draw the path of blood for the heart?

Draw the heart's blood valves?

Draw the air path from mouth to lungs? 

What is the role of the cardiovascular system? 

the cardiorespiratory system: what is the cardiorespiratory system?

the cardiovascular system: what is the cardiovascular system?

energy system: why is the energy system important?

What is cardiovascular disease?

What is the difference between the cardiorespiratory system and the cardiovascular? system?

What are common things in the cardiorespiratory system and cardiovascular systems?