Please enable JavaScript.

Coggle requires JavaScript to display documents.

special sences (lecture 1 (Special sences (Diseases and abnormalities …

- - - - Strubismus
        
        eyes do not focus together
      - Presbyopia
        
        farsightedness caused by loss of the lens
      - Macular degeneration
        
        Death of the macula the most sensitive portion of the retina
      - Myopia
        
        Nearsightedness
      - Hyperopia
        
        Far slightness caused by loss of lens elasticity
      - glaucoma
        
        increase in the intramuscular pressure
      - Catoract
        
        Far sightedness (blurry close up)
      - Amblyopia
        
        Lazy eye occurs early in childhood
      - conjunctivitis
        
        Clear lense becomes cloudy as a result of aging or trauma
      - Astigmatism
        
        curvature in the cornea that causes blurred vision
    - - Jelly like substance that is behind the lens and helps mantain shape
    - - Clear watery fluid that fills the space between the cornea and iris
    - - Circular structure behind the pupil that refracts the light so it can be focused
    - - Opening in the center of the eye. Regulates the amount of light
    - - colored part of the eye
    - - Rod is used for dark and no light
      - Cones are sensitive to light and color and is located in a depression on the back of the retina
    - - Innermost part of eye that has many layers of nerve cells and transmits light impulses to the optic nerve
    - - Sences allow the body to react to the environment
    - - Sence of sight
      - Light rays transmitted through optic nerve
      - protection of the eye
        
        Bony socket
        
        Eyelids and eye lashes
        
        Lacrinal glands
        
        Make tear and keep eye clean and moist
        
        Conjuctiva
        
        Musuc membrane that lines the eyelids and covers eye to protect
- - - - outer ear
        
        Pinna or avricle
        
        auditory canal
        
        Tympanic membrane
      - middle ear
        
        Mallues
        
        one of the three ossicles in the middle ear
        
        incus
        
        receives vibrations from the malleus and transmits these to the stapes
        
        Stapes
        
        smallest bone in the body the transmits sound vibrations from the incus
        
        Eustachion
        
        how the middle ear is connected to the pharynx. allows air to middle ear and help equalize air and pressure
      - inner ear
        
        vestibule
        
        entrance to the parts of the inner ear
        
        Oval window part
        
        helps transmit the motion of the ear drum to the inner ear
        
        cochlea
        
        shaped like a snail contains hair like organs
        
        semicircular canals
        
        helps with balance in the brain
        
        organ of corti of sound waves and transmits the impulse from sound waves into the auditory nerve
      - Diseases and abnormalities
        
        otosclerosis
        
        inherited bony overgrowth of the footplate on the stapes
        
        Hearing loss
        
        sound cannot get through inner ear
        
        otitis externa
        
        infection of the external auditory canal