nerves and senses ana
TRANSCRIPT
NERVES AND SENSES
BY:ANA GARCIA CALDERÓN
VOLUNTARY MOVEMENTS:Our sense organ detect informationabout the enviroment and send it to the brain. Then the brain interprets the information and react. Motor
nerves transmit nerves impulses to the muscles.
INVOLUNTARY MOVEMENTS:Our sense organ detec information about the enviroment and send it to the spnal cord. It
interpretes information and reacts quickly. Motor nerves transmit the nerve impulses from the spinal
cord to muscles.
SHIGHT
Close and open the eye
Transparent layer that Protect the pupil
Small hole that lets light into the eye
It focuses light on the retina
Coloured partHas got optic cells that detect lihgt and colours, send information to the brain.
HOW DO THE EYE WORK
Light goes to the eye through pupil and lens.
Lens project 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 transmit nerves impulses to the brain.
The brain interpretesinformation.
SMELL
TASTE
HEARING Outer ear: eardrum and ear canal.
Middle ear: hammer, anvil and stirrup.(ossicles)
Inner ear: semicircular canal and cochlea.
ossicles
cochlea
Semicircularcanals
auditory nerve
HOW DO THE EAR WORK
The sound waves go into the ear canal and hit the
eardrum
Eardrum vibrate
When eardrum vibrates
transmit this vibrations to the
cochlea.
The cochlea produces nerve
impulses. Auditory nerve transmit these impulses to the
brain. Finally the brain interprets the information.
TOUCHThere 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.