Blood vessels and Structure of heart
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19 Terms
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Arteries
Thick muscular walls and carry oxygenated blood away from the heart
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Veins
Carry blood towards the heart under low pressure
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Capillaries
Link between arteries and veins and the site of gaseous exchange
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Blood pressure
Contains two measurements; systolic and diastolic pressure
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Vasodilation
Blood vessels widen to increase blood flow and supply of oxygen
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Vasoconstriction
Narrowing of blood vessels to decrease blood flow and supply of oxygen
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Redistribution of blood
Blood moving away from inactive areas (digestive organs) to active areas (muscles) during exercise
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Valves
Inside veins to prevent backflow of blood
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Atria
Top 2 chambers of the heart; short and round
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Ventricles
Bottom 2 chambers of the heart: long and thin
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Aorta
Main artery taking oxygenated blood to the body
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Pulmonary artery
Directs deoxygenated blood to the lungs
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Pulmonary vein
Directs oxygenated blood into the left atrium
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Vena Cava
Vein bringing deoxygenated blood back to the heart
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120mmHg
80mmHg
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Elastic walls
Arteries
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Wide lumen
Veins
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Systolic blood pressure
Pressure of blood when the heart contracts
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Diastolic blood pressure
Pressure of blood when the heart relaxes
Note 
Flashcards (20)