the senses
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The Senses . VISION:. Sclera Cornea Choroid Ciliary body Iris Retina. VISION CONT’D:. THREE LAYERS: Outer layer Sclera- white part; maintains shape; attachment Cornea- transparent; part light enters Middle layer Choroid- blood vessels Iris- gives eye its color Pupil light enters

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Presentation Transcript
vision
VISION:
  • Sclera
  • Cornea
  • Choroid
  • Ciliary body
  • Iris
  • Retina
vision cont d
VISION CONT’D:
  • THREE LAYERS:
    • Outer layer
      • Sclera- white part; maintains shape; attachment
      • Cornea- transparent; part light enters
    • Middle layer
      • Choroid- blood vessels
      • Iris- gives eye its color
        • Pupil light enters
    • Inner layer
      • Retina- photoreceptors; light energy to impulses to CNS
hearing
HEARING:
  • Vibrations in the air around us
  • Deep, low-pitched sounds = low frequency (100-500 vibrations per second)
  • High-pitched sounds = high frequecy (1000-5000 vibrations per second)
ear anatomy
EAR ANATOMY:
  • External ear- collect and funnel sounds
  • Auditory Canal- tiny hairs and wax
  • Middle ear-sound waves transmitted
    • Malleus (hammer)
    • Incus (anvil)
    • Stapes (stirrup)
  • Cochlea- begins inner ear carries impulses to the brain by acoustic nerves
hearing cont d
HEARING CONT’D:
  • BALANCE:
    • 3 tiny canals located above cochlea
    • Structures that help maintain our
      • Balance
      • movement
smelling
SMELLING:
  • NOSE:
smelling cont d
SMELLING CONT’D:
  • Chemoreceptors
    • Located in upper region of the nasal cavity
    • Contain cilia extend into air passageways of nose
    • Chemicals stimulate them, causing impulses to be sent to the brain

*Mystery!

taste
TASTE:
  • Lips
  • Roof of mouth
  • Throat
touch cont d
TOUCH CONT’D:
  • 2 types respond to heat and cold
    • Scattered directly below the skin
    • ¾ warm to every cold
  • 2 types respond to touch
    • Fingers, toes, and lips are most sensitive
  • 1 type to pain
    • Located throughout skin
    • Prickling (fast) pain; Burning/aching (slow) pain
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