Structure of the ear The ear is divided into three parts which are the outer ear, middle ear and inner ear. The outer ear is made up of the pinna, ear canal and the ear drum. The pinna picks sounds or vibration. The vibration is carried to the ear drum, which is between the outer ear and the middle ear. The sound then passes through the ossicle of the middle ear to the inner ear from where it is transmitted to the brain through the auditory nerve. Ear canal contains tiny hair, oil and wax that the help to trap germs and dirt preventing them from entering into the inner ear.
Care of the ear Avoid putting any sharp object into the ear
Remove wax from the ear canal regularly using cotton bud.
Wash the outer ear daily and dry carefully with clean towel.
Do not attempt to reach your middle and inner ear with any object.
Report any form of ear ache to the doctor immediately.
WEEK 5 TOPIC: THE HUMAN BODY SUBTOPIC: STRUCTURE AND FUNCTIONS OF THE SKIN The skin is the outer covering of the body.
Structure of the skin The skin s made up of two layers.
1. The epidermis: This is the outer layer it has no blood vessels or nerves. It is cover with hairs and tiny holes called sweat pores. Sweat passes out through the pores.
2. The dermis or true skin: This is the inner layer of the skin. It made up of;
i.Sweat glands which produce sweat.
ii. Oil glands which produce oil that keep the skin and hair fresh.
iii. Blood vessels and nerves which keep the skin healthy and help it to perform its functions.
vi. Fat deposits which reduce heat loss from the body.
Types of skin 1.Normal skin: is soft, smooth and without spots.
2. Dry shin: is usually thin, sensitive and wrinkles easily.
3.oily skin: is greasy and occurs when the oil gland produces too much oil.
4. combination skin (dry and oily skin). Has some part of the skin oily eg the nose and fore-head while other parts are dry ed checks and legs.