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.
Kinnikuman Muscle Grand Prix complete the mode and to watch the ending credits. The "Challenge" class is a 4-fighter series where the player has to beat 2 of them to be classified as "S" (Gold), "A" (Silver), "B" (Bronze) rank. Being defeated by one of them will result in a game over with a "D" (purple colored medal) rank. The "Muscle" class is an 8-fighter series where the player has to beat 3 of them to be classified as "S" (Gold), "A" (Silver), "B" (Bronze) rank. Being defeated by one of them will result in a game over with a "D" (purple colored medal)