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SENSES. UNIT 4. (Senses Stimulus travelling to the brain through the…
SENSES. UNIT 4.
Senses
Stimulus travelling to the brain through the nerves
Hearing
To understand sounds.
PARTS
MIDDLE EAR
Eardrum
vibrates
Ossicles
vibrate
INNER EAR
Cochlea
sends the information to the auditory nerve
OUTER EAR
Ear flap (pinna)
picks up the sounds
Ear canal
takes the sounds to the eardrum
Smell
to smell odours
PARTS
Nasal cavity
Olfatory bulb
helps us to identify the smells
Nostrils
separated bay the nasal
septum
Touch
To know how an object feels like
Sight
To see colour, shape and size
EYEBALL
PUPIL
is the black circle in the middle of the iris
RETINA
turns the light in the eye into nerve signal
IRIS
. Coloured circle.
NERVE SIGNALS
sends the information to the brain
PROTECTIVE PARTS OF THE EYE
Eyelashes
keep the dust out of the eye
Eyelids
stops excess light
Eyebrows
Keep dust out of the eye
Lacrimal glands
produce tears
Taste
. to identify flavours
ORGAN SENSE:
Taste buds help us indentify four basics tastes.
Bitter
Sweet
Sour
Salty
TAKING CARE OF OUR SENSES
Looking after your sight
Never look directly at the sun
Do not touch your eyes with dirty hands
Do not read or write in low light
Looking after your skin
Wear sunscreem
Protect your hands when touching hot or cold things
Do not expose your skin to the sun
Whashing the hands and cutting the nails
Looking after your hearing
Avoid noisy places
Listen to music at a sensible volume
Looking after your smell and taste
Avoid very hot or very cold food
Take care of your teeth
