Chapter 10 SPECIAL SENSES.

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Presentation transcript:

Chapter 10 SPECIAL SENSES

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. SENSORY RECEPTORS Sensory receptors are structures which are stimulated by changes in the environment They are found all over the body in the skin, connective tissue, and muscle © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. THE EYE © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. THE EYE Sclera - outer layer or white of eye Cornea - center and front of sclera Choroid coat - middle of the eye Iris - colored, muscular part Pupil - circular opening in iris Lens - behind iris and pupil Retina - innermost (third) coat © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. THE EYE © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. PATHWAY OF VISION © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. EYE DISORDERS Conjunctivitis Glaucoma Cataracts Macular degeneration Detached retina Eye injuries Vision defects Presbyopia Hyperopia Myopia Amblyopia Astigmatism Diplopia Strabismus © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. THE EAR © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. THE EAR The outer ear collects sound waves and directs them into auditory canal The middle ear equalizes air pressure The inner ear fluid-filled duct vibrates with sound waves © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. EAR DISORDERS Otitis media Otosclerosis Tinnitus Presbycusis Meniere’s disease Hearing loss Conductive hearing loss Sensorineural damage © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. THE NOSE The human nose can detect about 10,000 different smells © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. DISORDERS OF THE NOSE Rhinitis Nasal polyps Deviated nasal septum © 2004 Delmar Learning, a Division of Thomson Learning, Inc.

© 2004 Delmar Learning, a Division of Thomson Learning, Inc. THE TONGUE The tongue is a mass of muscle tissue with structures called papillae Taste buds cover the papilla, which are stimulated by sweet, sour, salty, and bitter tastes © 2004 Delmar Learning, a Division of Thomson Learning, Inc.