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.
Note: that when the number of sides of a polygon is increased without limit, the sides merge into one line and polygon becomes a circle. Parts of a Circle : The radius of the circle is a straight line drawn from the center to the boundary line or the circumference.The plural of the word radius is radii. The diameter is the line crossing the circle and passing through the center.It is the twice of the length of the radius.The circumference of a circle is the boundary line or the perimeter of the circle. The chord is a straight line joining two points on the circumference points of a circle.The diameter is a special kind of the chord passing through the center. An arc is a part of the circumference between two points or a continuous piece of a circle. The shorter arc between and is called the minor arc.ote: that when the number of sides of a polygon is increased without limit, the sides merge into one line and polygon becomes a circle. Parts of a Circle : The radius of the circle is a straight line drawn from the center to the boundary line or the circumference.