1 Matching The following parts of the nervous system are a mixed-up list of the ear, eye, and brain. It is just a big mish-mashi Straighten it out by writing whether each of the following is to part of the brain (central nervous system CNS); part of the gar, or part of the ove (peripheral nervous system PNS) aqueous humour __ bipolar neuron __ cerebellum __ cerebral cortex __ ciliary body __ cornea __ retina __ Eustachian tube __ Incus/anvil __ Malleus/hammer __ medulla oblongata __ ossicles __ optic chiasma __ pituitary __ photoreceptors __ saccule __ stapes/stirrup __ tympanic membrane __ auditory nerve __ blind spot __ cerebrum __ choroid __ ciliary ligaments __ cochlea __ fovea centralis __ iris __ cones and rods __ hypothalamus __ lens __ meninges __ optic nerve __ oval window __ pinna __ pupil __ round window __ semicircular canals

To organize the parts of the nervous system into their respective categories, we will classify each term as part of the brain (central nervous system, CNS), part of the ear, or part of the eye (peripheral nervous system, PNS).<br /><br />### Brain (Central Nervous System - CNS)<br />1. Cerebellum<br />2. Cerebral cortex<br />3. Medulla oblongata<br />4. Optic chiasma<br />5. Pituitary<br />6. Hypothalamus<br />7. Thalamus<br />8. Meninges<br />9. Cerebrum<br /><br />### Ear<br />1. Eustachian tube<br />2. Incus/anvil<br />3. Malleus/hammer<br />4. Ossicles<br />5. Saccule<br />6. Stapes/stirrup<br />7. Tympanic membrane<br />8. Auditory nerve<br />9. Cochlea<br />10. Pinna<br />11. Oval window<br />12. Round window<br />13. Semicircular canals<br /><br />### Eye (Peripheral Nervous System - PNS)<br />1. Aqueous humour<br />2. Bipolar neuron<br />3. Ciliary body<br />4. Cornea<br />5. Retina<br />6. Photoreceptors<br />7. Blind spot<br />8. Choroid<br />9. Iris<br />10. Lens<br />11. Pupil<br />12. Ciliary ligaments<br />13. Fovea centralis<br />14. Cones and rods<br />15. Optic nerve<br /><br />This classification helps in understanding which parts belong to the central nervous system and which are part of the peripheral structures related to the senses of hearing and sight.