Page 138 - Primary Six Notes

 The cochlea contains two fluids i.e. perilymph and endo-

lymph to convert sound vibrations into impulses.

 The auditory nerve helps to carry sound impulses to the

brain for interpretation.

 The semi-circular canals help to balance the body in a right

posture.

Common problems of the ear

 Foreign body in the human ear. e.g. dust and insects

 Deafness-inability to hear. It is caused by infection of the ear

if not detected early or can be through inheritance

 Others by damaging the ear drum after piercing it with a

sharp object.

Types of deafness Disorder (defect)

1. Partial deafness

2. Inability to hear

Care for the ear

 Avoid using sharp objects to clean the ear. Sharp objects

break and damage the eardrum.

 Use soft materials to clean the ear.

 Have regular health examination

 Remove excess wax from the external ear that can cause

temporary deafness by blocking the eardrum.

 Clean your ear with clear water and soap regularly.