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lesson 2

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
what is the role of blood vessels   carry blood away from the heart, exchanges wastes and materials, and carry blood back to the heart.  
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Arteries   carry blood to body, branch into smaller arteries  
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Coronary Arteries   carry blood to the heart itself from the aorta, and to the organs  
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Epithaical Tissue   inner layer, enables blood flow  
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Smooth Tissue   middle layer, relaxes and contracrts allowing arteries to widen and narrow  
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Connnective Tissue   outer layer, allows arteries to withstand the force of pumping blood  
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What rus through the tissue of the body   blood vessels  
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Capilaries   wastes and materials are exchaned,pass easily from the blood, through the capilary walls, and into the body cells, only has epithelial cells, one type is diffusion  
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Diffusion   molecules move from and area of higher concentration to an area of lower concentration  
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Veins   blood enters here and goes back to the heart, thinner than arteries  
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What causes blood pressure   the force with which ventricles contract  
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Blood Pressure   force exerted by blood against the walls of blood vessles  
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