1.

Distinguish Between :Arteries and veins.

Answer»
ArteriesVeins
1. The blood vessels that arise from the heart and carry blood away from heart are called arteries.1. The blood vessels that bring blood to the heart are called veins.
2. Arteries are thick walled blood vessels, situated in deep layers in the body.2. Veins cure thin walled blood vessels, situated superficially in the body.
3. Arteries do not have valves.3. Veins have valves.
4. Tunica adventitia, the outermost layer of arteries is thick and elastic.4. Tunica externa, the outermost layer of veins is thin.
5. Tunica media is very thick and contain elastic fibres.5. Tunica media is thin layer and contain involuntary muscle fibres.
6. The lumen of arteries is small.6. The lumen of the veins is very spacious.
7. With the exception of pulmonary arteries, all other arteries carry oxygenated blood.7. With the exception of pulmonary veins, all other veins carry deoxygenated blood.
8. Blood in the arteries show high blood pressure.8. Blood in the veins show lesser blood pressure.


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