Biology
- Created by: Nathaniel
- Created on: 03-05-13 17:24
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- Biology
- The Heart
- Creates a lub dub sound
- Blood transport systems
- Arteries
- Carry blood away form the heart
- Has a thick wall with muscle fibres and elastic tissues
- So the walls can stretch under the pressure from the heart and recoil helping the blood along
- a lot of pressure is on the walls of the arteries
- Veins
- Carry blood to the heart
- watch pocket valves to stop the blood flowing the wrong way
- Little pressure on the walls
- Allow it to pass easily
- Capillaries
- Carry blood to organs and other tissues
- must be small enough to go between cells
- Arteries
- The Heart
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