blood and blood vessels
- Created by: Tilly Blincow
- Created on: 14-03-17 14:44
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- Blood and blood vessels
- Red blood cells
- Also known as erythrocytes
- Carry oxygen
- Deliver carbon dioxide to the lungs
- Arteries
- Carry blood at high pressure
- Walls are made of muscles
- Largest artery is called the Aorta
- Carry blood away from the heart
- Veins
- Return blood to the heart
- Contain valves which prevent backflow of blood
- Carry blood at a low pressure
- The Vena Cava is the largest vein
- Capillaries
- 1 cell thick walls
- Allow gas exchange
- Occur in large quantities around muscle
- Nutrients and waste pass through Capillary walls
- Blood components
- Plasma - liquid that surrounds all of cells
- Thrombocytes (platelets) - important for blood clotting
- Leucoytes (white blood cells) - help fight infection
- Erythocytes (red blood cells) - contain haemoglobin
- Red blood cells
- Veins
- Return blood to the heart
- Contain valves which prevent backflow of blood
- Carry blood at a low pressure
- The Vena Cava is the largest vein
- During exercise most of the blood goes to the working muscles
- To reduce build up of lactic acid
- Takes away the carbon dioxide from the working muscles
- Prevents fratigue
- The working muscles need lots of oxygen
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