B4.2
- Created by: KiranVi
- Created on: 03-04-17 13:22
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- The Blood Vessels
- Vein
- Carries blood back from the heart
- Capiillaries join up to form veins
- Blood is at a lower pressure - thin walls
- Large lumen to help blood flow
- Capillaries
- Involved in the exchange of substances at the tissues
- Walls are very thing to allow substances to diffuse through their semi permeable membranes easily
- Glucose and oxygen pass out o the blood through capillary walls
- Artery
- Thick walls containing muscle and elastic fibres
- Carries blood away to the heart
- Vein
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