transports substances around your body. consists of your heart, blood vessels and blood.
Blood is pumped to your lungs so carbon dioxide can be exchanged for oxygen:
OXYGENATED BLOOD provides glucose and oxygen to cells
DEOXYGENATED BLOOD takes away waste products
blood passes through your heart TWICE
1. carries blood from heart to lungs and then BACK to your heart.
2. carries blood from your heart to all the other organs and then BACK to your heart.
right side of your heart: pumps blood that is low in oxygen to your lungs to pick up oxygen
left side of your heart: pumps blood that is rich in oxygen to all other parts of your body
the heart: responsible for continuously pumping blood around your body and so much of it's wall is muscle tissue.
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