Blood vessels
mindmap of blood vessels if anythings wrong please let me know.
- Created by: Jennifer Howard
- Created on: 18-05-13 13:28
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- Biology unit 2 Blood vessels
- artery
- awey from the heart to tissues.
- thick muscle layer to control volume.
- thick elastic layer to maintain smooth pressures.
- no valves as there is a high pressure so no backflow.
- thick walls which prevent bursting.
- vein
- from tissues to heart.
- thin mucle layer as blood pressure isnt to intense going back to the heart
- thin elastic layer as of low blood pressure
- valves present to ensure no back flow.
- Capillary
- Used for exchange of materials between the blood and body cells.
- very thin so short diffusion pathway.
- numerous and branched for large surface area.
- narrow diameter, co cell far from one another.
- narrow lumen, squeezes blood cells for short diffusion pathway.
- spaces between the lining allowing white blood cells to leave and fight infection.
- arteriole
- from arteries to cappilaries under low pressure
- thick muscle layer to control movemtent into capillaries
- thinner elastic layer as of lower pressures
- artery
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