INTERACTION AND HELTH: SIGHT AND HEARING

INTERACTION AND HELTH: SIGHT AND HEARING

1. SIGHT

   • Light enters our eye though the CORNEA and the PUPIL
   • The IRIS is a muscle that makes the pupil bigger or smaller
   • The LENS frouses the ligh. This allows images to be projected onto the retina at the back of the eye
   • NERVE RECEPTOR in the retina send this information along the OPTIC NERVE to our brain

2. HEARING

   • Our ear has tree parts
     • outher ear
     • middle ear
     • inner ear
   • Sound waves make enter the ear the AUDITOR CANAL
   • Soun waes make the EARDRUM vivrate
     • Contein 3 small bones
       • MARTILLO
       • Yunque
       • Estribo
   • The cochlea transform sound vibration into electrical signals to our brain
   • The AUDITORY NERVE sends these signals to our brain
   • The SEMICIRCULAR CANALS in the inner ear help us keep our balance when we move