Page 139 - Primary Six Notes

 Avoid too loud sounds e.g. noisy places such as factories, lis-

tening to loud music especially using headphones

Uses of wax found in the ear

 It traps dust and some foreign bodies in the ear

 It cleans the ear canal

 It protects the ear against infections , wax contains chemi-

cals that kill germs

Comparing The Human Ear with Hearing in other Animals

Hearing in Fish

Fish use lateral line to detect and pick up sound

vibrations in water

Hearing in Snakes

Snakes do not have actual ears, but they

have inner ear systems such as cochlea in

mammals. *> ■>

In snakes the cochlea is connected to jaw bones,

this makes it sensitive to ground vibrations by the help of jaw

bones connected to cochlea.

Hearing in Birds ib*

Birds have a ruff of feathers called auricular n
which they use to detect sound in the environ-

ment .