(1) A nonspecific term for any condition that affects multiple arteries. (2) Polyarteritis nodosa, see there. (pol'Ä-ahr'tÄr-Ä«'tis) Simultaneous inflammation of a number of arteries. inflammatory and degenerative lesions of the arterial walls in a number of isolated locations.
The Border Collie comes in two coat varieties: rough or smooth. Both varieties are double coat and weather resistant and are close fitting and thick. The outer coat is either wavy or straight and coarse in texture. The under coat is dense, short, and soft. The rough coat variety has fur of medium length.
Firm training is necessary because the border collie can become dominant or aggressive.Male border collies usually stand 19 to 22 inches at the shoulders and reach 30 to 45 pounds. Females are 18 to 21 inches tall and weigh 27 to 42 pounds.The many varieties of terriers have some similar characteristics.