| SENSE | ORGAN
 | Sight | Eyes
 | Hearing | Ears
 | Smell | Nose
 | Touch | Skin
 | Taste | Tongue

 

Our BRAIN controls our CENTRAL NERVOUS SYSTEM. The Nervous system is made up of: 

·         Spinal cord: It’s made up of nerves tissue and it’s inside our column.

·         Nerves

·       The neurons are divided in three parts: cell body, axon and dendrites.

·       They are connected together by the synapse and the messages are transmit by electrical signal.

·       The message goes from the cell body, through the axon, to the dendrites.

 

Your sense of touch, or tactile sense, is made up of a very fine network of receptors in your skin, forming your body's largest sensory system. Because there are so many sensory nerves, you can feel the lightest touch. The skin is your body's shield, and touch makes you aware of your boundaries. Your sense of touch only gives you the experience of being touched by a 'thing'. In order to know what is touching you, the observation needs to be expanded with your other senses: by looking at what's touching you, feeling its structure or its temperature.

The sense of touch is formed by a large number of tactile organs situated just under the surface of the skin between the epidermis and the dermis (figure 1). The tactile organs are simple receptors connected by nerve axons. The receptors sense pressure on the skin, and that is how you can feel touch. There are tactile organs all over the body. The distance between the receptors determines sensitivity, which differs for different parts of your body. Fingers, tongue, lips, nose and forehead are very sensitive to touch, meaning that these parts have a higher density of tactile organs. Not surprisingly, perhaps, these are all important parts of the body for feeling or touching. Other areas, such as the back or the soles of the feet, have a lower density of tactile receptors and are less sensitive to touch. 

Neuron are star-shaped cells that consist of a cell body

Nerve impulses are electrical ipulses.They travel from one

 neuron to another neuron.The space between one neuron and another is called a synapse.