Biology Chapter 5 - Part 1
- Created by: elliebaxter
- Created on: 26-01-17 19:40
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- Biology Chapter 5 - Part 1
- Circulatory system and the heart
- Blood circulatory system
- blood
- blood vessels
- heart
- Arteries
- blood away from heart and around body
- oxygenated (except pulmonary artery
- Veins
- deoxygenated (except pulmonary vein)
- blood to heart
- Left side of heart more muscular to pump blood around body
- Blood circulatory system
- Heart
- one loop of blood goes through heart twice
- Split into 4 chambers
- Valves prevent backflow
- Coronary arteries - carries oxygenated blood to the heart muscle
- Helping the heart
- Resting heart rate is 70b/m
- Natural pacemaker is in the right atrium (sinoatrial node)
- Artificial pacemakers are fitted into the chest to regulate the heart rate
- If a heart is diseased a person could have a heart transplant
- Artificial hearts can be used for people waiting for a transplant or to give the heart time to recover
- If a heart is diseased a person could have a heart transplant
- Artificial pacemakers are fitted into the chest to regulate the heart rate
- Blood flow
- Stents can be inserted to keep blood vessels open
- Artificial or animal valves stop blood from flowing in the wrong direction due to leaky valves
- Coronary heart disease causes the arteries to become narrow and fatty, cutting off the blood supply to the heart muscle
- stents - mesh inserted with baloon, baloon then pops and is removed
- Circulatory system and the heart
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