The five human senses are the sense of sight, hearing, touch, smell and taste. These five human senses play a unique role by receiving signal information from the environment through the sense organs and transmitting them to the human brain for interpretation. The brain in receiving and interpreting information tells the body how to respond. These senses are contained in specially adapted body sense organs that include the eyes, ears, skin, nose and tongue.
The sense of sight is manifested through the eyes, which detects color or light. The eyes have the ability to perceive images and see visible elements. Light enters the eyes and travels through the particular characteristics of the eye such as the pupil, the lens and the retina towards the special receptors in the brain through the optic nerve. The brain then interprets the images and sends them back to the eyes and therefore is able to see. The sense of sight is important for a human being, because without it or its loss, one is not able to see. The light travels at high speed and the eyes receive it just as quickly and transmit it to the brain.
The sense of hearing is manifested through the ears, which detect the sound. Hearing is the perception of sound. The sound is detected by the ear through vibrations that enter the ear canal and vibrate the eardrum. The vibrations then extend to the inner ear through special bones called hammer, anvil and stirrup, which further transmit information to the brain. The brain therefore advises on what has been heard as whistling, screaming, noise and so on.
The sense of touch manifests itself through the skin; the skin detects heat, cold, pressure and pain. The skin has many receptors that detect the pressure levels applied to it and the time of application. The skin also has the ability to perceive temperature and through its multiple receptors transmits impulses through the peripheral nervous system to the central nervous system and to the brain. The brain therefore interprets and is able to know if it is hot or cold and when there is pain or friction.
Smell manifests through the nose. The nose helps to detect perfumes and chemicals in the air. Olfactory receptors in the nose collect chemicals in the air or from food. These perfumes travel directly to the olfactory cortex of the brain. The brain, in interpreting and transmitting information, allows us to detect these odors and recognize a particular odor. It is therefore possible to know if it is a good or bad smell and is able to respond accordingly.
The sense of taste manifests itself through the tongue. The tongue detects the flavors: salty, sweet, sour and bitter. Taste is the ability to detect different chemicals in foods, minerals and even poisonous substances. This happens through the taste buds, which are the sensory organs of the tongue. By using these flavors, the body is able to distinguish nutrients from harmful substances. The language distinguishes appetizing and disgusting substances.