The Circulatory System - Blood Vessels
- Created by: alexda
- Created on: 31-01-15 20:51
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- The Circulatory System - Blood Vessels
- Arteries
- Arteries transport deoxygenated blood away from the heart to the lungs.
- Blood is carried under very high pressure so:
- Capillaries
- Capillaries are involved in the exchange of materials with the tissues.
- Oxygen passes through the capillary wall and into the tissues, carbon dioxide passes from the tissues into the blood
- Permeable walls so substances can diffuse in and out.
- Very narrow diameter
- Capillaries are involved in the exchange of materials with the tissues.
- Veins
- Veins transport oxygenated blood to the heart from the lungs.
- Blood is carried under low pressure so:
- Arteries branch into capillaries. Capillaries eventually join up to form veins.
- Arteries
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