Circulation Count the number of times your heart beats in one minute.

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Presentation transcript:

Circulation Count the number of times your heart beats in one minute. What do heartbeats do? Why is it important for your heart to pump blood?

Circulation

Circulation

Circulation

Circulation

Circulation

Circulation Blood Vessel Function Structure of Wall Artery 3 layers: Inner-epithelial tissue Middle-muscle Outer-connective tissue Carries oxygen away from the heart to the rest of the body Capillary Single layer of epithelial cells Exchange of materials between cells and blood Vein Epithelial cells Connective tissue Smooth muscle Carries deoxygenated blood from the body to the heart

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