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Nerves and senses ana

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Nerves and senses ana

  1. 1. NERVES AND SENSES BY:ANA GARCIA CALDERÓN
  2. 2. VOLUNTARY MOVEMENTS: Our sense organs detect information about the environment and send it to the brain. Then the brain interprets the information and reacts. Motor nerves transmit nerves impulses to the muscles.
  3. 3. INVOLUNTARY MOVEMENTS: Our sense organs detect information about the environment and send it to the spinal cord. It interprets information and reacts quickly. Motor nerves transmit the nerve impulses from the spinal cord to the muscles.
  4. 4. SHIGHT Closes and opens the eye Transparent layer that protects the pupil A small hole that lets light into the eye It focuses light on the retina Coloured part It has got optic cells that detect light and colours, then it sends information to the brain.
  5. 5. HOW DOes THE EYE WORK? Light goes into the eye through pupil and lens. The lens projects an upside down image onto the retina. The optic cells detect lights and colours. They send nerve impulses to the optic nerve . The optic nerve transmits nerves impulses to the brain. The brain interprets information.
  6. 6. SMELL
  7. 7. TASTE
  8. 8. HEARING  Outer ear: eardrum and ear canal.  Middle ear: hammer, anvil and stirrup (ossicles)  Inner ear: semicircular canals and cochlea. ossicles Semicircular canals auditory nerve cochlea
  9. 9. HOW DOES THE EAR WORK? The sound waves go into the ear canal and hit the eardrum Eardrum vibrates When eardrum vibrates it transmits this vibration to the cochlea. The cochlea produces nerve impulses. Auditory nerve transmits these impulses to the brain. Finally the brain interprets the information.
  10. 10. TOUCH There are nerve endings in the dermis. They detect information. Then sensory nerves transmit nerve impulses to the brain. The brain interprets information. Your skin keeps bacteria and microbes out of your body and it uses sunlight to have vitamin D and to control your body´s temperature.

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