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13 Cards in this Set
- Front
- Back
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What are atrio-ventricular valves? |
Valves between the atria and ventricles which ensures that blood flows In the correct direction |
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What is the cardiac muscle? |
A specialised muscle found in the walls of the heart chambers |
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What is the semilunar valve? |
Valves that prevent blood re-entering the heart from the arteries |
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What blood does the left hand side of the heart contain and where is the blood pumped to? |
It contains oxygenated blood and pumps it to the body |
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What blood does the right hand side of the heart contain and where does it pump the blood to? |
It contains deoxygenated blood and pumps it to the lungs |
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What artery and vein are found on the left side of the heart? |
Artery - aorta Vein - pulmonary vein |
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What artery and vein are found on the right side of the heart? |
Artery - pulmonary artery Vein - vena cava |
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What is the surface of the heart covered in and what will happen if these would become constricted? |
The surface of the heart is covered in coronary arteries that supply the heart with oxygenated blood if these arteries become constricted or blocked, blood flow to the muscle is reduced. Which can cause angina or heart attack due to the lack of oxygen and nutrients |
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What is the wall of muscle which prevents the mixing of the oxygenated and deoxygenated blood? |
The septum |
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What prevents the atrio-ventricular valves from turning inside out? |
Tendinous chords |
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Explain the amount of pressure that the atria has |
The muscle of the atrial walls is very thin as the distance from the atrium to the ventricle is small so little pressure is needed |
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Explain the amount of pressure the right ventricle has |
It is thicker than the atria enabling the ventricle to pump blood out of the heart to the lungs. The blood doesn't need to travel far as the lungs is right beside the heart, also the alveoli is very delicate and can be damaged by very high pressure |
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Explain the amount of pressure the left ventricle has |
The left ventricle's wall is 3 times thicker than the right ventricle as the distance from the heart to the rest of the body is far greater than the distance that the right ventricle's has to pump it's blood. This needs sufficient pressure to overcome systemic circulation (friction) |
