WE TAKE CARE OF OUR SENSES

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TOPIC 2

Central nervous system functions

Controls voluntary movements , thoughts and memories.

Spinal cord

Coordinates movements.

Brainstem

Controls involuntary movements.

Cerebrum

Regulates the functions of our internal organs.

Cerebellum

The sense of sight. Parts

Pupil

Cornea

Retina

Lens

Optic nerve

The sense of hearing. Parts

Ear canal

Ear

Auditory nerve

Eardrum

Cochlea

small bones

How our sense of hearing work.

The cochlea detects the vibrartions and send the information along the auditory nerve.

The eardrum vibrates when the sound reaches it.

The ear detects sound vibrartions which travel along the ear canal.

The three small bones also start to vibrate.

The sense of smell. Parts

Olfactory epithelium

Nasal cavity

Olfactory nerve

Nostrils

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