ANP 1106 Lecture Notes - Lecture 17: Bulbous Corpuscle, Occipital Lobe, Substance P

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jacqueline Carnegie

Document Summary

The iris is composed of smooth muscles in radial and circular layout for dilating and constricting the pupil. The pupil is the opening of the iris which lets light pass into the eye. The ciliary body is made of smooth muscles for changing the shape of the lens to which it is attached via suspensory ligaments: sensory (retina, the sensory tunic is commonly named the retina. It includes a pigmented layer and a neural layer. The pigmentary layer covers the choroid, ciliary body, and the posterior surface of the iris in order to absorb light so that it does not reflect on the interior walls of the eyeball. Blockage of these sinuses leads to increased intraocular pressure and glaucoma. Vision: pupil size: the pupil controls the amount of light entering the eye. Contraction of circular muscles produces pupillary constriction and contraction of the radial muscles produces pupillary dilation.