Heart

• (Circulatory system)
• To keep blood,nutrients,and oxygen pumping in circulation.
• Your heart is about the size of your fist
• your heart beats about 100,000 times a day

Viens

• (circulatory)
• Average human transports 2,000 gallons of blood through veins daily
• Transfers nutrients,oxygen,waste,and blood.
• Average adult has 5 to 6 quarts of blood

Lungs

• (Respritory)
• Carbon dioxide is the byproduct of oxygen when breathed through lungs
• Average adult lung contains about 600 million alveoli
• Average adult Breathes about 2,100 to 2,400 each day

Diaphragm

• (Respritory)
• When exhaling diaphragm contracts
• When inhaling diagram expands
• Diaphragm covers the width of your body

Sources:
http://kidshealth.org/en/teens/lungs.html?ref=search#
-http://science.nationalgeographic.com/science/health-and-human-body/humanbo...
http://www.livescience.com/22486-circulatory-system.html