Blood Vessels 0.0 / 5 ? BiologyHeart vesselsASAQA Created by: samanthah01Created on: 05-03-15 20:02 Veins- Function To carry blood from tissues to the hear 1 of 15 Veins - Walls Thin, mainly collagen, blood at low pressue 2 of 15 Veins- Lumen Large to reduce resistant flow 3 of 15 Vein- Valves Many to prevent backflow 4 of 15 Veins- Blood Dexoygenated and at a low pressure 5 of 15 Capillaries- Function Allow exchange of materials between the blood and the tissues 6 of 15 Capillaries- Walls Very thin, permeable, only one cell thick to allow for exchange 7 of 15 Capillaries- Lumen Very small, blood cells must distort to pass through 8 of 15 Capillaries- Valves None 9 of 15 Capillaries- Blood Pressure falls, changes from oxygenated to deoxygenated 10 of 15 Arteries- Function Carry the blood from the heart to the tissues 11 of 15 Arteries- Walls Thick with smooth elastic layers to resist high pressure, muscle layer to aid pumping 12 of 15 Arteries- Lumen Small 13 of 15 Arteries- Valves No valves except in heart 14 of 15 Arteries- Blood At a high pressure, usually oxygenated except from Pulmonary artery 15 of 15
Explain the course of events that leads to atherosclerosis (endothelial damage, inflammatory response, plaque formation, raised blood pressure). (Activity 1.8) 0.0 / 5
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