Iris sphincter muscle Iris sphincter muscle The iris sphincter muscle (pupillary sphincter, pupillary constrictor, circular muscle of iris, circular fibers) is a muscle in the part of the eye called the iris. It encircles the pupil of the iris, appropriate to its function as a constrictor of the pupil. It is found in vertebrates and some cephalopods. Initially, all the myocytes are of the smooth muscle type but, later in life, most cells are of the striated muscle type. Its dimensions are about 0.75 mm wide by 0.15 mm thick. In humans, it functions to constrict the pupil in bright light (pupillary light
The Five Days But in the face of so much injustice and violence, Romulus responds, indicating instinctively what is the point of view of the people. "The Five Days" was released in Italy on 20 December 1973. The Five Days The Five Days (Italian: Le cinque giornate; also known as The Five Days of Milan) is a 1973 comedy-drama film directed by Dario Argento. The film is set in Milan in full swing during the anti-Austrian revolt of 1848. A petty criminal, Cainazzo (Adriano Celentano) and a baker, Romulus (Enzo Cerusico), are involuntarily involved in the movements of that period, the person finding