WELCOME TO A&P UNIT 8 By Vesna Gvozdenovic, RN.  1. GENERAL ( distributed throughout the body)  2. SPECIAL ( special receptors in localized areas) 

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Presentation transcript:

WELCOME TO A&P UNIT 8 By Vesna Gvozdenovic, RN

 1. GENERAL ( distributed throughout the body)  2. SPECIAL ( special receptors in localized areas)  Eye ( rods and cones)  Ear ( organ of Corti and cristae ampullares  Nose ( olfactory cells)  Taste buds ( gustatory cells)

 Free nerve endings ( skin and mucosa )  Encapsulated nerve endings Meissner’s corpuscles Ruffini’s corpuscles Pacinian corpuscles Krause’s end-bulbs Golgi tendon receptors Muscle spindles Question: where are photoreceptors located?

 What is conjunctiva?  What eye structure is involved in a cataract? Please answer both questions

 Myopia ( nearsightedness )  Hyperopia ( farsightedness )  Presbyopia  Astigmatism  Question: do you know what are orthokeratology and vision therapy?

WHAT NUMBER DO YOU SEE?

1.External ear - Auricle - External auditory canal (tympanic membrane) 2.Middle ear - Ear ossicles ( malleus, incus, stapes) - Oval window - Auditory ( Eustachian tube) 3.Inner ear - Vestibule, semicircular canals, cochlea

1.CONDUCTION IMPAIRMENTS ( blockage of the external or middle ear ) Otitis Otosclerosis 2.NERVE IMPAIRMENT Chronic exposure to loud noise Presbycusis Meniere’s disease Question: what is another name for the eardrum?

 Chemoreceptors = taste buds  Located on special tongue areas (papillae)  Gustatory cells = specialized cells in taste buds  Question: If we eat something very spicy, why do we instinctively reach for ice cubes?

 Olfactory receptors = chemoreceptors  Located in the upper part of the nasal cavity  Very sensitive and easily fatigued

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