true or false ____7. Veins have a thick and large luminal space. ____8. Vasa Vasorum is both present in veins and arteries of the Tunica Media. ____9. Arteries generally appear rounded while veins are of flattened appearance. ____10. Oxygen centration is lower in pulmonary veins as compared to pulmonary arteries. ____11. Valves are present in arteries, veins and lymphatic vessels except capillaries.

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