Do You Hear What I Hear 3 parts

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Do You Hear What I Hear?

Do You Hear What I Hear?

3 parts of the ear Outer n Middle n Inner n

3 parts of the ear Outer n Middle n Inner n

Outer Ear n n n Pinna (auricle) – visible part of the ear (function

Outer Ear n n n Pinna (auricle) – visible part of the ear (function is to collect sound waves) External auditory cannal – ear canal Tympanic Membrane – ear drum and it separates the outer and middle ear

Cerumen n Cerumen – ear wax n Function – is to protect the ear

Cerumen n Cerumen – ear wax n Function – is to protect the ear

Middle Ear n A. n Cavity in the temporal bone Connects with the pharynx

Middle Ear n A. n Cavity in the temporal bone Connects with the pharynx by the Eustachian tube – which equilizes pressure in the middle ear with the outside atmosphere

Middle Ear n Contains the 3 smallest bones in the body which transmit sound

Middle Ear n Contains the 3 smallest bones in the body which transmit sound waves to the inner ear: u Malleus (Hammer) u Incus (Anvil) u Stapes (Stirrup)

Inner Ear n n Contains the cochlea – Spiral – shaped organ of hearing

Inner Ear n n Contains the cochlea – Spiral – shaped organ of hearing Cochlea contains a membraneous tube, the cochlea duct, which is filled with fluid that vibrates when sound waves are transmitted by the stapes n

Inner Ear n Organ of Corti – delicate hair-like cells that pick up vibrations

Inner Ear n Organ of Corti – delicate hair-like cells that pick up vibrations of fluid and transmit them as a sensory impulse along the auditory nerve to the brain

Inner Ear Semicircular Canals – three structures in inner ear that contain liquid set

Inner Ear Semicircular Canals – three structures in inner ear that contain liquid set in motion by head and body movements n Impulses are sent back to the cerebellum to help maintain body balance (equilibrium) n

Pathway of Hearing External auditory canal Tympanic membrane incus, and stapes) Auditory nerve Ossicles

Pathway of Hearing External auditory canal Tympanic membrane incus, and stapes) Auditory nerve Ossicles (malleus, cochlea

The Nose n Smell accounts for 90% of taste n Tissue in the nose

The Nose n Smell accounts for 90% of taste n Tissue in the nose (olfactory epithelium) contains specialized nerve cell receptors n Those receptors stimulate the OLFACTORY NERVE to send to brain

The Tongue n Mass of muscle tissue n Bumps on the surface are PAPILLAE,

The Tongue n Mass of muscle tissue n Bumps on the surface are PAPILLAE, they contain the taste buds n Receptors in taste buds send stimuli through 3 cranial nerves to the cerebral cortex