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Heart
- How the heart is adapted to its function
- Valves ensure that blood can only flow in one direction through the heart
- The walls of the atria are thin.
- They can be stretched to receive blood as it returns to the heart
- They can contract with enough force to push blood through the atrioventricular valves
- They can be stretched to receive blood as it returns to the heart
- The walls of the heart are made up of cardiac muscle
- The cardiac muscle has its own blood supply
- The cardiac muscle has its own blood supply
- Valves ensure that blood can only flow in one direction through the heart
- The heart normally beats at 70 bpm
- This can change through exercise
- This can change through exercise
- The medulla controls the changes in heart rate
- The Right ventricle only pumps to the lungs
- The left pumps blood to the rest of the body which requires much more pressure.
- The left pumps blood to the rest of the body which requires much more pressure.
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