The five senses

Nostril, smell cells, nose cavity, palate, retina, optic nerve, iris, pupil, cornea, lens, semi-circular canals, cochlea, nerve cells, inner ear, throat, middle ear, eardrum, external ear.

The five senses are: sight, taste. hearing, smell and touch. All the sense organs collect information in a different way. But they all send messages along nerves to the BRAIN, where they are interpreted and acted upon.

Light enters the eye through an opening at the center of the iris called the pupil. What we see is focused (made clearer) by the lens, and is recorded on the retina at the back of the eye. Within the retina are nerve CELLS that messages to the brain about the colour and brightness of light entering the pupil.

Taste buds in the tongue give us a sense of taste. Different taste buds can recognize the four flavors: salt, sour, sweet and bitter.

The eardrum vibrates when sounds hit it. This in turn makes three small bones in the middle ear vibrate. The vibrations pass to the cochlea of the inner ear. Nerve cells in the cochlea inform the brain of the loudness and pitch of the sound waves entering the ear.

Many substances give off a scent or smell. The smell consist of millions of tiny particles which float in the air. We use our noses to detect them. When we smell a flower, for example, the particles are drawn up the nose to the smell cells in the upper part of the nasal cavity. The cells tell the brain what kinds of particles they are.

Nerves in our skin give us a sense of touch. We can feel whether objects are rough or smooth, wet or dry and we can respond to sharp pressure. Fingertips and lips are the most sensitive areas.

II. Body. Give names for the indicated parts of the head.

1. _ _ _ _

2. _ _ _ e _ _ _ _

3. _ _ _ b _ _ _

4. _ _ _ _ _ s _

5. _ _ e _ _ _

6. _ _ _ e _

7. _ _ _ t _ _ _

8. _ _ u _ _

9. _ _ _

10. _ h _ _

11. _ a _

12. _ _ c _

III. Body. Match each of the following parts of the body with the correct number in the picture below.

IV.

1. The blind man ran the ….. of his fingers over the box.

a) points b) edges c) tips d) ends

2. When people sweat, the liquid comes out through the ….. of the skin.

a) veins b) vents c) pores d) holes

3. The ….. is the main air passage of the body.

a) intestine b) ear c) windpipe d) kidney

4. The main function of the heart is to ….. blood round the body.

a) push b) propel c) pump d) walk

5. Arnold Schwartzeneger has an enormous chest …...

a) growth b) swelling c)expansion d) inflation

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