2536464
Description
Flashcards by Kit Sinclair, updated more than 1 year ago
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Created by Kit Sinclair
over 9 years ago
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| Question | Answer |
| circulatory system | pumps blood containing glucose and oxygen around the body |
| what is blood used by? | cells to produce energy through respiration |
| describe the journey blood takes around the body | heart -> pulmonary artery -> lungs -> pulmonary vein -> heart -> aorta -> body -> vena cava -> heart |
| VEAL | Veins Enter Arteries Leave (the heart) |
| double circulation | during one full circuit of the body, blood passes through the heart twice |
| features of an artery | - thick wall - narrow lumen (hole) - high pressure |
| features of a vein | - thin wall - large hole - valves (stops backflow) - low pressure |
| features of a capillary | - wall is one cell thick - narrow hole - low pressure |
| what does blood contain? | - red blood cells - white blood cells - plasma |
| red blood cells | - contain haemoglobin (combines reversibly with oxygen to create oxyhaemoglobin) - no nucleus (more space to carry haemoglobin) |
| coronary arteries | supply heart muscles with oxygen and glucose (for respiration) |
| right side of heart v.s left side of heart | - right has thinner muscle wall than left - right goes to lungs, left goes to body |
| why might you need a stent? | if your coronary arteries have become blocked with large amounts of saturated fat / cholestrol |
| bypass | when a blocked coronary artery is 'bypassed' using a piece of vein, usually from the leg |
| artificial heart pros and cons | - not always reliable - batteries run out - risky surgery - gives patient longer to live - body can't reject it |
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