Structure of the Heart - AQA - Unit 1
Revision on the valves, vessels, ventricles and atria.
- Created by: Eleanor
- Created on: 17-03-13 13:56
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- Structure of the Heart
- Valves
- Atrioventricular
- Between the ventricles and atria on both sides of the heart
- Prevents the backflow of blood when ventricular pressure exceeds atrial pressure
- Ensures that blood flows to the aorta and pulmonary artery instead of back to the atria
- Semi-Lunar
- In the aorta and pulmonary artery
- Atrioventricular
- Vessels
- Aorta
- Connected to the left ventricle
- Carries oxygenated blood to all areas of the body (except the lungs)
- Connected to the left ventricle
- Pulmonary Vein
- Connected to the left atrium
- Carries oxygenated blood back from the lungs
- Unusually for a vein it carries oxygenated blood
- Carries oxygenated blood back from the lungs
- Connected to the left atrium
- Vena Cava
- Connected to the right atrium
- Brings deoxygenated blood back from body tissues
- Connected to the right atrium
- Pulmonary Artery
- Connected to the right ventricle
- Carries deoxygenated blood to the lungs
- Unusually for an artery it carries deoxygenated blood
- Carries deoxygenated blood to the lungs
- Connected to the right ventricle
- Aorta
- Atria
- The top chambers on both sides of the heart
- Thin walled and elastic - stretches as it collects blood
- Only pumps blood a short distance to the ventricles
- As such they have a thin muscular wall
- Ventricles
- The lower chambers on both sides of the heart
- Has to pump blood some distance around the body
- Much thicker muscular wall than the ventricles
- Either to the lungs or the rest of the body
- Valves
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