Sense Organs

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Sense Organs

• By Veronica
• Renata

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Structure of the Tongue and Mouth
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Taste

• The tounge is a muscular organ found in your
  mouth, the primary organ of taste and important
  in the formation of speech and in chewing and
  swallowing our food. The tnogue is coverd with
  approximately 10,000 tasted bus, grouped in areas
  sensiteve to sweet, sour, salry, and bitter
  flavors. Chemicals from the food we eat stimulate
  receptors in each of these areas, and nerves
  transmit this input to the brin. the sense of
  smell adds information to give us a wide range of
  tasted. Our tonge helps us in chewin, it holds
  the food againts the teeth in swallowing, it
  moves the food back into the pharynx and then
  into your stomach

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Structure of the Ear
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Structure of the Ear

• The human ear consist of 3 structures the outer
  ear, the middle ear, and the inner ear. The outer
  ear has the auricle (pinna), which is the visible
  part of the ear that is attached to the side of
  your head it also consist of the waxy,
  dirt-trapping auditory canal, moving tiny hairs
  that stimulate fibers conndected to the auditory
  nerve. The tympanic membrane also known as the
  eardrum separates the external ear from the
  middle, an air-filled cavity. Once you are at the
  cavity you will find 3 small bones- the malleus
  (hammer), the incus (anvil), and the stapes
  (stirrup). The cochlea and the semicircular
  canals also make up the inner ear.

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Function of the Ear

• Sound is a series of vibrations moving as waves
  through air or other gases, liquids, or solids.
  Sometimes sound waves are transmitted to the
  inner ear by a method of hearing called bone
  conduction. People hear their own voice through
  bone conduction. The voice causes the bones of
  the skull to vibrate, and these vibration
  directly stimulate the sound-sensitive cells of
  the inner ear. only a relatively small part of a
  normal person's hearing depends on bone
  conduction, but the deaf people can be helped if
  sound vibrations are transferred to the skull
  bones by a hearing aid

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Structure of the Eye
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Function of the Eye

• The amount of light entering the eye is
  controlled by the pupil, which dilates and
  contracts accordingly. The cornea and lens, have
  a shape that is adjusted by the ciliary body, and
  it focuses the light on the retina, where
  receptors convert it into nerve signals that pass
  to the brain. A mesh of blood vessels, the
  choroid, supplies the retina with oxygen and
  sugar. Lacrimal glands secrete tears that wash
  foreign bodies out of the eye and keep the cornea
  from drying out. Blinking compresses and releases
  the lacrimal sac, creating a suction that pulls
  excess moisture from the eyes surface.

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Continued

• The eye has a transparent tissue that is called
  the cornea. The cornea has a circle of muscles
  behind called the iris which adjust the size of
  the pupil to control how much light passes
  through to the sensitive parts of the eye

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Vision Diseases

• Color Blindness is a vision problem with this
  vision problem people have a difficulty
  distinguishing certain colors, such as red and
  green or blue and yellow.
• Symptoms of color blindness are if you are having
  trouble telling the reds, blues, greens, and
  yellows apart.
• The cause of color blindness occurs when certain
  cells in the retina that normally respond to
  color do not respond as they should.