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Heart attack

Cholesterol

Stent

Components of the blood Red blood cellsThe red blood cells are responsible for the transport of Oxygen through the body White blood cellsThe white blood cells are responsible for the defense against microorganisms and viruses. PlateletsThe platelets (fragments of other cells) help in blood clotting. PlasmaThe blood plasma transports dissolved substances through the body.

Arteries, capillaries and veins

From heart to organs From organs to heart

Oxygenated blood(1 exception)

Deoxygenated blood(1 exception)

High pressure Low pressure

Thick walls Thin walls

NO valves Valves