What is the difference between veins and capillaries?

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Solution

Veins Capillaries
Veins are larger in structure. Capillaries are very small and simple in structure.
Veins have three layers. Capillaries only have a single layer.
Veins transport blood between different parts of the body. Capillaries transport blood between blood stream and tissues.
Veins mostly carry deoxygenated blood (except pulmonary veins). Capillaries carry both oxygenated and deoxygenated blood.

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Veins	Capillaries
Veins are larger in structure.	Capillaries are very small and simple in structure.
Veins have three layers.	Capillaries only have a single layer.
Veins transport blood between different parts of the body.	Capillaries transport blood between blood stream and tissues.
Veins mostly carry deoxygenated blood (except pulmonary veins).	Capillaries carry both oxygenated and deoxygenated blood.