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BIOLOGY 2423: Special Senses Assignment Use the figures, tables, and text from Chapter 22 in Tortora to correctly complete this assignment. Be as complete and specific as possible in finding the locations and functions of these special senses structures, since this material will surface on Exam 3. EYE COMPONENTS Memory Matrix Eye Component Part of which tunic (fibrous, vascular, or sensory?) Retina Sensory Vitreous Chamber N/A Function (Hint: there is a table in the chapter) Contains vitreous body; helps maintain shape of eyeball & keeps retina attached to choroids. Ciliary Body Small depression in macula lutea (center of posterior retina) containing only cones for color vision Fovea Centralis (central fovea) Anterior Cavity N/A Contains aqueous humor; maintains shape of eyeball, supplies O2 & nutrients to lens & cornea Sclera Iris Lens N/A Choroid Cornea 1 EXTRINSIC EYE MUSCLES Memory Matrix Eye Muscle Does the following movement(s) (Hint: Use the actions from Exhibit 11.2 from chapter 11) Which nerve innervates it? (Hint: Use Fig. 19.18 from chapter 19) Superior Rectus Inferior Rectus Medial Rectus Lateral Rectus Superior Oblique Inferior Oblique 2 EAR COMPONENTS Memory Matrix Ear Component Part of external, middle or inner ear? Contains endolymph; Transmits pressure waves from scala vestibule, scala tympani, & vestibular membrane to endolymph Cochlear Duct External Auditory Canal Round Window Function (Hint: There is a table in the chapter) External Dissipates pressure waves from the scala tympani back into the middle ear Vestibular Apparatus Oval Window Transmits vibrations from the stapes to set up fluid pressure waves in the perilymph of the scala vestibule in the cochlea Tympanic Membrane Pinna (auricle) Saccule Auditory (Eustachian) Tube Semicircular Ducts Utricle Auditory Ossicles 3 INNER EAR Learning Exercise The inner ear is also called the labyrinth, because of its complicated series of canals. It consists of the inner membranous labyrinth outer that is enclosed by an outer bony labyrinth. Use Fig. 22.12 to visually aid you in this part of the assignment. Inner Ear Component Part of bony or membranous labyrinth? Semicircular Canals If part of membranous labyrinth, then in what part of the bony labyrinth does it reside? N/A Cochlear Duct Utricle Membranous Scala Vestibuli Vestibule Bony N/A Saccule Semicircular Ducts Cochlea Semicircular Canal Bony N/A Scala Tympani 4