carry deoxygenated blood to the heart [except pulmonary veins]; veins, with the exception of the pulmonary vein, carry blood that has been used by body tissues, back to the heart; veins carry blood and waste products to the heart where these will be processed through the lungs and given oxygen again.rtery Structure. arteries have three layers: a smooth inner layer; a strong, muscular layer; and a thin outer layer; connective fibers in artery walls allow for the elasticity needed for the artery to function; arteries are usually larger than veins.
Asker's rating. 1  Cl- has the smallest radius due to the fact that atoms' radii get smaller as you go up and to the right in the periodic table. 2  F- has the smallest radius. 3  Sice flourine is in the lowest energy level so it has the lowest radius. 4  fluorine.
It may be difficult to imagine, but there is a country in the world smaller than New York Cityâs Central Park and one with a population smaller than a typical high-school class. Based on landmass, Vatican City is the smallest country in the world, measuring just 0.2 square miles, almost 120 times smaller than the island of Manhattan. Situated on the western bank of the Tiber River, Vatican Cityâs 2-mile border is landlocked by Italy.