An externality is defined as a benefit or cost that is imposed on a third party, such as society, other than the producer or consumer of a good or service, or, more simply, an economic side effect. The more of a product that is consumed or produced, the more of an externality that results.
Arteries carry oxygenated blood (with the exception of the pulmonary artery and umbilical artery). Veins carry deoxygenated blood (with the exception of pulmonary veins and umbilical vein).
Yes, Arteries are stronger and thicker than veins because they get more pressure from the heart. Arteries take blood away from the heart. Veins take blood toward the heart. Th â¦ e two major properties of artieries are their elasticity and contactility.