Touch

The skin is an amazing organ that helps us feel and react to the world by sensing pressure, temperature, and pain.

This occurs because special nerve cells called sensory neurons are present in the skin. When you touch a pencil, these neurons send signals to the brain, allowing you to sense its texture, shape, and pressure. Some body parts, such as the hands, feet, face, tongue, and lips, have more sensory neurons, making them extra sensitive.

The skin has four main types of touch receptors:

Mechanoreceptors detect pressure, vibrations, and textures, helping us recognize different surfaces.

Thermoreceptors sense temperature, warning us if something is too hot or cold.

Pain receptors or nociceptors alert us to harm, like sharp objects or extreme heat.

Proprioceptors help us know where our body parts are without looking. They send signals to the brain, allowing smooth and balanced movement.

Sometimes, our body reacts before the brain fully processes the information. This is called a reflex arc, like touching something hot and instantly pulling your hand away.