The sensory system allows humans to receive information about the environment and body through five senses: smell, taste, sight, hearing, and touch. Smell receptors are located in the nasal cavity near the pituitary area, and the sense of smell needs taste to work properly. Taste receptors are located on the tongue in bumps called taste buds, which help detect different flavors. Sight is mediated through the eyes, where light enters through the pupil and is focused by the lens on the retina, which sends signals through the optic nerve to the brain. Hearing occurs when sound is collected by the outer ear and transmitted through the inner ear canal, middle ear bones, cochlea, and auditory nerve to the brain. Touch

1. The sensory system

2. In order to perform the interaction function,
human beings receive information from the
environment and from our body
through the five senses.
Smell
Taste Sight Hearing Touch

3. Olfatory nerves
are in the nasal
cavity next to the
pituitary area
The sense of smell
needs the sense of
taste in order to
work properly.
What does the
sense of smell
need to work
properly?
Where are the olfatory nerves
located?

4. Taste receptors are
on the tongue.
They are small
bumps called
taste buds.
Taste buds helps
us taste
the different
flavours.
Bitter
Sour
Salty
Sweet
Where….?

5. Pupil Retina
Lens Optic nerve
The eyes are the sense organs
that give us the sense of sight.
• Light enters the eyes
throught the pupil,
the lens and the retina.
• The retina sends
stimuli to the brain
through the optic nerve.

6. The ears are the organs for the sense of hearing.
.
.

7. First, the outer ear collects
the sound.Next, the sound passes
through the inner ear canal,
the middle ear and the three
small bones.Then , the sounds
reach the cochlea and the
auditory nerve. Finally, the
auditory nerve sends signals
to the brain.

8. The skin is the main
organ of the sense of
touch.
Touch receptors can detect
temperature, pressure, pain
and texture.
The sense of touch
.