Iris dilator muscle "musculus dilator pupillae", The "Nomina Anatomica" as authorized in 1895 in Basle and in 1935 in Jena used the full Latin expression. Iris dilator muscle The iris dilator muscle (pupil dilator muscle, pupillary dilator, radial muscle of iris, radiating fibers), is a smooth muscle of the eye, running radially in the iris and therefore fit as a dilator. The pupillary dilator consists of a spokelike arrangement of modified contractile cells called myoepithelial cells. These cells are stimulated by the sympathetic nervous system. When stimulated, the cells contract, widening the pupil and allowing for more light to pass through the eye.
World Colored Light Heavyweight Championship met reigning colored heavyweight champ Harry Wills on 2 March 1922 in Madison Square Garden in New York City for a 15-round bout, losing to the great champion via a K.O. in the second round. Wills outweighed him by 25¾ lbs. On May 9 of that year, Lee Anderson took on Tiger Flowers in Ciudad Juarez, Mexico for a 15-round bout to determine the colored light heavyweight title. Anderson won his second colored crown when he K.O.-ed Flowers in the seventh round. Anderson apparently vacated the title in turn, and Kid Norfolk took the crown title for the second time