ARTERIES: They can carry blood away from the heart., No substances leave or enter this vessel., They carry oxygenated blood (with one exception), They contain blood at high pressure., A pulse is created by heart pumping & contraction of wall muscle., They have thick muscular walls., CAPILLARIES: They have delicate walls which are easily broken., They contain blood at low pressure., They have very thin walls for escape or fluids., They have no valves., They carry blood through tissues and organs., They carry a mix of oxygenated and deoxygenated blood, VEINS: They carry deoxygenated blood (with one exception)., They contain blood at lowest pressure., There is no pulse., They have flexible walls which are squashed easily so blood is pushed further along vessels., They have thinner walls with less vessels., They have valves to stop blood flowing back.,

Reading activity: Classifying (science)

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