Knowledge about the five senses

five senses

Is a blessing of God Almighty, the man was one of those senses become has a deficit and we will define the five senses and explain the mechanism of action, and is considered the five senses is an important source for the realization of all living organisms, as they are considered an important element to know what is happening and how it happened and felt a sense of him and cognition it is also, as the senses five entire task and we use everything is linked to everything in our lives to connect with others and search and detection, science and identify the nature of things, and every sense of the special function, for example, hearing it is to distinguish sounds, such as the sense of smell are to distinguish smells in addition to the sense of taste it is to distinguish foods, as the philosopher Aristotle is the class of the five senses, a sense of smell and sense of taste and sense of hearing and sense of sight and sense of touch.

Sight
One of the five senses and the capacity of the brain through the eye to detect electromagnetic waves of the light or the reflection of light on objects to interpret image perspective it an eye sees things to distinguish colors and shapes reveal the light from the darkness, so when light passes from the lens of the eye that leads to the reflection of the image and then the retina in turn transfer the image to the brain is capable of recognizing.


Way vision: rays fall on the eye and the image you will find that the first thing to offset the cornea, a transparent layer in the foreground and which protects the eye, then the pupil of the eye, which is in the iris and here the role of the iris comes a muscle it controls the size of the pupil depending on the light intensity. If severe become small albeit low, it becomes tight.

Passes the beam then through the vitreous (gel) until it reaches the beam to the retina which contains nearly 150 million sensory photocell most important of the so-called rods and cones where the function bars determining the shape and work well in a gloomy lighting the cones, Vtaataraf the colors and works well in light illumination, and then play these cells to send orders to the brain through the nerves to the brain is up the picture upside down, and by the visual cortex, a part of the brain distinguishes the human image properly and this process should be very quick parts of seconds.


Hearing
One of the five senses and is the ear's ability to capture the frequencies of the sound waves transmitted through the air and aware, Valozn distinguish sounds to identify the voice of a friend from the other and also distinguish between different voices surrounding human beings from animals and machines, among others.


Hearing method: passing sound waves through the outer ear, which is compiled and sent to the eardrum, which in turn Bahtzazat when capturing waves leading to the impact on the three ossicles ear in the middle ear Vthrkha, and then shaking the oval window which leads to move the liquid, who is inside the inner ear and thus the vibrations to the so-called cochlea of ??the inner ear, which contains thousands of Aalkhalaaa small capillary which is that you convert these existing fluid waves into nerve impulses, and this is done through the auditory nerve, then moves on to the auditory brain center and of course within Damaa are analyzing sounds way understood by humans and distinguishes between those sounds.


smelling
One of the five senses and is the nose's ability to distinguish various smells and with the passage of air into the nose raises olfactory receptors, which reaches a certain chemical reaction in the brain, which in turn analyzes the odor and then distinguishes between human smells good and malignant happen.


Sniffer method: the nose is one of the parts of the respiratory system, the part of content in the middle of the human face is divided from the outside to the bones and cartilage contains inside the cavities separated by the nasal septum, and the cavity is connected Balblaom inside and line the cavity mucous membrane located  secreted mucous substance which in turn works to moisturize the air inhaled, As for the hair on the front of the slots it exists to protect the nose of exotic objects and dust to enter the inside of the body.


Taste
One of the five senses which is the ability of the tongue to distinguish the taste and taste the different materials, when a person eats the tongue tastes the food through the so-called tongue buds that turn occur chemical reaction that sets it apart brain starts after brain analyzed and the distinction between foods to distinguish the sweet taste of bitter.


The modus operandi of the sense of taste: the tongue Lists, which differentiates the taste of different materials after dissolve in saliva, and is divided tongue into several parts that will identify the taste which is found on the surface of the tongue, a so-called buds of the tongue, but for the texture of coarse existing tongue, the papillae are adds this feature of the tongue, As for the mechanism of action of the sense of taste it by melting food because saliva found in the mouth leading to the work of the buds that absorbs the taste and you are converting to the brain that characterizes taste.


Touch
One of the five senses which is the ability of the human parties to recognize the special features of things and get to know their characteristics, when touching the sides for a particular body is the skin function of a link between UFOs and nerves located beneath it, and these nerves transporting capacity perceived body concrete of the brain, which in turn analyzed and interpreted and then distinguish between hot and cold and other qualities of the objects.


The modus operandi of the sense of touch: there are layers of the skin, which resides beneath the sensory tissue and nerves layer screens the dermis is the principal of the separation of the skin they prevent the entry of harmful fluids of the body, or the loss of fluids from the human body. If hurt this class became the human body is at risk, and there is another sun protection regime called pigment or Almilanossit that absorbs sunlight and prevent its devastating effects of the destruction of the cells so it browns the skin after exposure to the sun from the impact of protection is known that white skin is at risk more than skin brown Africa where there is frequently the disease, while for immigrants eggs warm countries understanding of the subject for this disease, the skin is as a means to regulate body temperature by producing sweat material that will reduce heat through neovascularization located under the skin and in the case of low temperatures, this vasoconstriction to reduce the proportion of sweating, which maintains the temperature cold.