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15 Cards in this Set
- Front
- Back
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Blood
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• Plasma is the liquid part of the blood.
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red blood cells |
• Red blood cells are the most numerous blood cells. They are made inbone marrow and they contain haemoglobin to transport oxygen. Theyalso give the blood its red colour.
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iron |
• Iron is needed to make red blood cells.
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white blood cells |
• White blood cells fight disease.
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platlets |
• Platelets clot the blood to stop bleeding
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The Circulatory System
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The circulatory system consists of the heart and the blood vessels
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Blood Vessels
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• Veins bring blood to the heart. They have a wider lumen than arteries,and valves to prevent backflow of blood.
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arteries |
• Arteries carry blood away from the heart. They have a narrow lumen andhave no valves.
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capillaries |
• Capillaries are thin blood vessels (1 cell thick) that allow substances topass into and out of the blood. They join veins to arteries.
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The Heart
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• Made of cardiac muscle - never tires
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contracts |
• Contracts to pump blood around the body
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chambers |
• Consists of 4 chambers - right & left atriums, right & left ventricles.
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right side |
• Right side of the heart pumps deoxygenated blood to the lungs
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left side |
• Left side of the heart pumps oxygenated blood to the rest of the body.The heart wall is therefore thicker/stronger on the left.
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valves |
• Has 2 valves to control the direction of the flow of blood.
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