The Heart GCSE Biology revison.
- Created by: ilona898
- Created on: 14-06-17 16:42
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- The Heart
- Double Circulatory System
- Right ventricle
- Pumps deoxygenated blood.
- To lungs then returns to heart.
- Pumps deoxygenated blood.
- Left Ventricle
- Pumps oxygenated blood.
- to all other organs.
- Gives up oxygen at body cells.
- Deoxygenated blood
- Pumps oxygenated blood.
- Right ventricle
- A pumping organ that keeps blood flowing.
- Walls made of muscle tissue
- Valves
- Make sure the blood flows in right direction.
- Stop blood flowing backwards.
- How blood is pumped.
- Flows into two atria from vena cava + pulmonary vein.
- Atria contract pushing blood into ventricles.
- Ventricles contract forcing blood to pulmonary artery
- Blood flows out of heart
- Flows to organs through arteries.
- Returns through veins. Atria fills up and cycle starts over.
- Needs own supply of oxygenated blood.
- Coronary arteries
- Branch off the aorta.
- Surround hear to make sure it gets the oxygenated blood.
- Coronary arteries
- Has a pacemaker.
- Resting heart rate
- Controlled by group of cells in right atrium wall act like a pacemaker.
- Produce small electric impulse spreads to surrounding muscle cells causes them to contract.
- Controlled by group of cells in right atrium wall act like a pacemaker.
- Resting heart rate
- Double Circulatory System
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