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21 Cards in this Set
- Front
- Back
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Circulatory system
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A system oloodf tubes with a pump and valves to ensure a one way flow of blood
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Double circulation
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The heart is divided into 2 sides each of which acts as a pump.The right side pumps deoxygenated blood to the lungs, the left side pumps oxygenated blood from the lungs out to the tissues
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Function of red blood cells
(erythrocytes) |
-transport oxygen from lungs to tissues
-transoirt co2 from tissues to lungs |
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Function of white blood cells
(phagocytes) |
-remove microorganisms that invade the body and might cause infection
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Function of white blood cells
(lymphocytes) |
-Produce antibodies, proteins that
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Function of white blood cells
(lymphocytes) |
-produce antibodies,proteins that help in the defense against disease
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Function of Platelets
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-Cell fragements involved in blood clotting
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Function of the heart
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the heart acts as a pump for the circulatory system , it creates the pressure that forces the blood through the arteries capilaries and veins by contracting
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Coronary heart disease
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Coronary heart disease occurs when the coronary artery becomes blocked, the blood flow to the heart muscle may be interrupted
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Capillaries
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Capillaries are very fine blood vessels that extend through all the tissues so every body cell is near a capillarie
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The effect of physical activity on the pulsrate
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During exercise the pulsrate increases as the muscles need more oxygen and more blood has to be pumped each minute
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Contents of the blood
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Blood is made of 55% plasma and 45% Cells
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Plasma
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Plasma is a watery liquid that suspends the blood cells
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Arterys
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Carry oxygenated blood from the lungs to tissues
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Veins
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Carry deoxygendated blood from tissues to lungs
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Atrium
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recieves blood at low pressure from veins
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Ventricle
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pumps blood at high pressure out to the arteries
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vena cava
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The main vein of the body; returns deoxygenated blood from the head and lower body into the right atrium
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Pulmonary arteries
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Carry deoxygenated blood to the lungs
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Pulmonary vein
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Returns oxygenated blood from the lungs
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Aorta
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the main artery of the body; carries oxygenated blood out to the tissues
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