Wonder ears

vocabulary
1. Inner: the inside part. Vibrate: to shake.IN TURN: in proper order. Section: a part. Outer: the outside part. Inmersed: to put something into a liquid. VIBRANT: full of life. Final: the last part. Movement: the act of moving. Interprete: to process. GOSSIP: informal talk about other´s people lives. Antennae: a device that sends and recieves signals.
main ideas
1. your ear is made up of 3 sections
  1. the outer ear
    1. it's also called the pinna.
      1. it's the part of the ear that you can see.
        the pinna is shaped so it can collect sound waves
        it sends these sound waves through a narrow (estrecho) tube called the ear canal.
        after the sound waves pass through the ear canal, they reach the eardrum.
        the eardrum is the last part of the outer ear.
        when the eardrum vibrates it passes the sound waves onto the middle ear.
  2. the middle ear
    1. the middle ear is a small air filled space behind the eardrum
      1. it contains the ossicles, which is made up of 3 tiny bones.
        when the eardrum is vibrated by sound, it moves these 3 tiny bones.
        the 1st one is the hammer and it's attached to the ear drum. when it shakes it passes the vibration through the next one that is called the anvil.
        the anvil, in turn, passes the vibration onto the stirrup, the smallest bone in the body.
  3. the inner ear
    1. the cochlea is the final destination of the sound waves and it's located into the inner ear.
      1. the cochlea is a small snail-shaped tube containing thousands of tiny hairs immersed in fluid.
        when the ossicles pass the vibrations onto the cochlea it makes waves in the fluid, wich moves the tiny hairs.
        the movement of the waves creates a signal which is transmitted to your brain.
        your brain interpretes this signals as a sound.
conclusion
1. LIKE A POWERFUL ANTENNAE, OUR EARS HELP US COMMUNICATE WITH THE WORLD AND ALLOW US TO LISTEN TO THE SOUNDS WE NEED TO HEAR.

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	Creado por Diana Monroy hace más de 9 años