BIOL 003 Lecture Notes - Lecture 25: Suspensory Ligament, Vitreous Body, Ciliary Body
Document Summary
Structure and function of the vertebrate eye and the response of the eye to stimuli. Oblique not straight muscles (slanted, wrapped around) Ciliary body + suspensory ligaments hold lens in place and determine shape (for focus) Iris: controls amount of light that enters pupil (can expand/shrink) Choroid: supplies blood to retina and other eye parts. Sclera: outer connective tissue protection and strength. Vitreous humour: clear gel, fills large space between lens and retina. Bipolar cells: look identical on both sides (i. e. bipolar) Ganglion cells: onion shaped, transmits info to optic nerve (a. k. a. Light changes shape of retinal & opsin sends message to close voltage dependent channels (stops depolarisation) Retina waste disposal: phagocytic cells (e. g. wbc macrophages) eat up dead cells of sensory cells before they repair. But brain flips the right way up. Optic chiasma: x- shaped structure where optic nerves cross over.
