organs of touch - a special receptors that are located in the skin, tendons, muscles, joints, and mucous membranes.With the help of these sensing devices the human body reacts to the combined effect of the surrounding stimuli: pain, thermal and mechanical.In the skin of the organs of touch they are unevenly distributed, for example, in the palms, fingers, lips, genitals and feet especially a lot of them, so these areas are the most sensitive to various environmental factors.Through this innate ability people can prevent serious damages and injuries of the body.
How do organs of touch?
perceived receptors fed nerve impulses in the cerebral cortex of the brain of the head, where are the sensitivity of the skin analyzer.As the main organ of touch - leather, even the slightest impact on her site is read and processing of information in your head that allows a person to react quickly to a source of irritation and in time to eliminate it.
reaction to pain
Pain, for example, are able to perceive the sensitive free nerve endings that penetrate the thickness of the epidermis.These receptors respond even to the slightest touch or breeze, especially in the hair roots.In addition, the epidermis contain Merkel cells, which have a close relationship with the sensitive nerves and are able to produce special substances that stimulate the immune system of the whole organism.
Perception mechanical factors
tactile organs responsible for the response to mechanical stimuli, called Meissner corpuscles.They are located in the papillary dermis fingers, external genitalia, lips and eyelids.Pressure receptors are the Vater-Pacini corpuscles, having a plate-like shape.Typically, they are located in the deeper subcutaneous layers of the fingers, sexual and internal organs, as well as in the walls of the bladder.On displacement of the skin, as well as their excessive squeezing react Ruffini corpuscles, the accumulation of which is observed in the deeper layers of the epidermis feet.Krause end bulb allow the person to respond to the stimuli of the conjunctiva, the language and the external genitalia.It is thanks to these receptors a person may feel a foreign body in the eye and in a timely manner to eliminate it, thereby preventing further irritation.
organs of smell and touch are very important for the normal life of the people, despite the fact that odor receptors develop only after birth.Undoubtedly, the animals are much better able to use these abilities because of that sometimes affect their lives.Many believe that this feature is not essential for a person, but feeling the smell, we can define the approaching danger long before it appeared.In addition, the nice-smelling things can significantly affect our perception of something or just to lighten the mood.From this we can conclude that nature has generously endowed us extraordinary abilities that help us to live and interact with each other.
