1) The nose
2) The ear,
3) The tongue
4) The skin
5) The eyes
They all contribute to us something special. And that is our senses. Changes in the surrounding are called stimuli.Our sensory organs then function as receptorsand receive the stimuli. For example, our ears detect stimuli when we hear something. The way the stimulus travels through our body is described below.
Stimulus > Receptors > Nerves > Brain > Nerves > Effectors (such as muscles)> response
( > is used to describe nerve impulses)
As seen above, after our sensory organs receive the stimuli, it sends nerve impulses to the brain which then interprets it, and effectively decides what to do. It then sends nerve impulses to the related effectors (parts of the body which carry out responses according to what the brain 'says') Some examples of effectors are muscles and glands.
Here is a simple chart of which shows our senses, and their corresponding sensory organs and stimuli.
| Action | Senses | Sensory Organs | Stimulus |
| Eating | Sense of Taste | Tongue | Taste |
| Listening | Sense of Hearing | Ear | Sound |
| Looking | Sense of Sight | Eyes | Light |
| Touching | Sense of Touch | Skin | Touch |
| Smelling | Sense of Smell | Nose | Smell |
