the black part of the eye is called black eye.
whats the black part of the eye called?
black eye
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.





















































section::::comparative anatomy.





















































this structure is found in vertebrates and in some cephalopods.





















































section::::general structure.





















































all the myocytes are of the smooth muscle type. 





















































its dimensions are about 0.75 mm wide by 0.15 mm thick.





















































section::::mode of action.
iris sphincter muscle
new delhi: telangana is an oily song, 57





















































mega-whats title winners 2009—qed, chennai 





















































mega-whats face-off winners 2009-10—qed, chennai 





















































section::::mega-whats city winners 2010.





















































bangalore: metaquizziks, 71 





















































chennai: qed, 76 





















































hyderabad: swami and friends, 46 





















































thrissur: guessworks inc., 43 





















































mumbai: travelling pilsbury, 53 





















































pune: mega wtf, 32 





















































goa: feni, vidi, vici, twitchy., 41 





















































kolkata: bong connection, 52 





















































new delhi: daydreamers, 42 





















































coimbatore: quizzyleaks, 16





















































mega-whats title winners 2010—qed, chennai 





















































mega-whats face-off winners 2010-11—insignificant others, chennai 





















































section::::see also.





















































bullet::::- quizzing in india





















































bullet::::- mahaquizzer





















































section::::external links.
karnataka quiz association