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individual skin - Traffic and holes I - Eyes, nose, ears, mouth

The skin has various natural openings through which a variety of information, fluids, body, fragrances, messages are entering the body or find a way out of it above. Eyes, nose, ears, mouth, navel, genitals, anus, pores, glands ... everyone has duties that are unique. For some orifices such as nose, mouth, vagina or anus, the skin becomes mucosa, moist, lubricated and free of inert surface layer. The digestive tract, respiratory and urinary tract are also endowed. Tears, snot, earwax, saliva, bile, milk, semen or mucus, feces liquids and solids, salts, water, blood and hormones are routinely excreted, exercise cycle, purgateur, nutritious, adjusted to balance ambient and marks states specific, recognizable, meaningful. Some brands are so unique and some are common to all humans, all living beings.


The eyes are part of the surface of the skin. The orbit is constantly bathed in fluid that cleans the dust or debris. Tears are paid when you feel pain or painful emotions, but also when there is joy and laughter. The main function of the eyes, the vision, we came to a reflex protective primitive face a hostile environment that requires rapid intervention. It allows the prosecution of any threatening object moving in our visual field. Movement perceived by reflex immediately alert brain areas involved. The result is a spontaneous movement of the head toward the object to transmit a picture to the nerve center that will be interpreted by the brain which, in turn, will decide how to hold: the flight, hunting, immobility or ... indifference. Implies a good view of visual acuity, the perception of a field of view through the recognition of contrasts, shapes and space, vision and color analysis of light and shade, a good binocular vision and stereo, and a good momentum since the vision commits a constant movement of the body changes and continuous changes of posture depending on the distance covered. Good vision depends so our condition, our age, pain which can seek our defense, our energy, concentration, various factors and variables in a single day. The accommodation, phase where the eye gets used and adjusts to almost any situation we lose little by little awareness or perception of our own fine condition. That, night vision which sees us move from darkness dense immobilizes the distinction gradual shades of gray that allows us to move. We are able to collect 15,000 shades of color. Color blindness has little to do with the brothers of convicts Lucky Luke , but everything to do with the inheritance on chromosome X in a state that does not allow the normal color perception, either by malfunction or absence of ocular channel. For eye color is the pigment melanin which colors the eye. The blindness is the total lack of vision . There are also the sighted less than 1 / 20 among the blind population .


Antechamber of the lungs and airways, the nose is lined with a mucous membrane self-cleaning which moistens, cools the air that we breathe at an acceptable temperature for the body and filters out particles dust and microbes. One function of nose is the olfactory or smell, recognizing and controlling the air we breathe and the taste, tracking more than savoring the smell of specific food. Humans can detect up to 400 000 different odors with its 5 million sensory cells. Pheromones, odorless molecules, influence our lives in subtle ways. These chemicals act as messengers between individuals of the same species. They play a crucial role during mating periods to attract the opposite sex. It is believed that this may also explain the synchronized menstrual cycles among women who se côtoient quotidiennement. Les récepteurs protéiniques des parois nasales jouent un rôle non seulement dans l’odorat mais aussi dans la vision, le goût, et même la mobilité des spermatozoïdes ou encore la communication sociale. Le plaisir sensoriel des odeurs et des parfums est sans doute un moyen que l’évolution a trouvé pour guider les organismes supérieurs vers les choses dont il est bon de s’approcher pour accroître ses chances de survie. L’odeur est l’un des meilleurs messagers du bonheur probable ou du danger à fuir. Peu importe que notre nez soit droit, busqué ou retroussé! Une fonction fondamentale du nez est la respiration whose main action is the oxygen intake lungs where the air is constantly renewed and in contact with the blood that circulates constantly throughout the body. This oxygen provides energy essential to our body directly. We can not do without breathing for more than a few minutes, so that we would do without eating for a few days.


Man reacts to vibrations with remarkable sensitivity. The ear perceives low frequencies as speech, music and noise. However, in many situations, the ear perceives only indirect effects of vibration in the form of a structure-borne noise is a noise from solids caused by vibration. The sounds indicate a movement, a continuous propagation of a wave, a phenomenon vibration between 20 Hz and 20 KHz. The frequency of sounds, from bass to treble, is expressed in Hertz (Hz). The sounds are converted into nerve impulses travel along the auditory nerve to the brain in charge of deciphering and interpreting. The result is the understanding, appreciation and enjoyment. Silence, meanwhile, is often perceived as background noise as found in nature. The silence Absolute is still a deaf , but for those whose hearing is intact, it would exist in space where there is no matter to transmit sound waves. While immersed in this ideal condition, we would hear the hissing still our blood flowing, our heart beat, movements of air in our intestines. clogged ears, impair our hearing, are often due to an accumulation of earwax. This waxy material, smooth and yellowish, is initially secreted into the external ear canal by certain glands for protection. L’ acouphène , des sifflements, des bourdonnements ou des tintements continuels ou intermittents dans les oreilles ou la tête sans stimulation auditive directe, fait souffrir plus de 700,000 personnes au Québec. Si on est malentendant , il est possible d'obtenir une prothèse auditive (appareil à conduction osseuse) ou un implant cochléaire afin de compenser notre handicap. La manière dont le bruit est perçu par chacun est hautement subjective. Le lien entre gêne et intensité physique du bruit est variable d’une personne à l’autre. L’organisme réagit à une stimulation acoustique non-specifically as a physical or mental. If the repetition of attacks is high and sustained over long periods, it depletes. We need as much as possible to remain under our threshold of tolerance to fatigue to be protected against damage mental, physical and social. Thus, during sleep, your body gets used to noise and normally recharges. If sleep is interrupted or affected, restoration of energy does not operate properly. Also, the ear plays a role in the balance of our body. This is ensured by three interrelated and interdependent systems : The vestibular system, part of the inner ear provides information about the movement and speed of movement of the head in space and on the position of the head relative to the axis of gravity; vision informs nerve centers on the actual situation of the body in space and proprioception inform on how your body makes contact with the ground by the arch and assesses how to keep our balance thanks to the play of muscles and joints. Underwater , we delivered an illusory sensation of weightlessness because these systems are disrupted and alter our perception.



The mouth is composed of two distinct zones behind the lips: the vestibule, the space which inflates cheeks when breathing, and oral cavity that protects three essential organs: the teeth, tongue and salivary glands. Mouth across several functions: ingestion, chewing and moistening of food, transport and swallowing into the esophagus, early breakdown of sugars by saliva flow of air, phonation, and taste, not to mention the aesthetic and expressive. Our thirty-two teeth are essential and each function précises: les incisives et les canines servent à déchirer et à couper; les prémolaires et les molaires à broyer les aliments. La pression exercée par la mâchoire de l’humain est de 15 à 20 kg/cm ² . Et l’émail qui recouvre les dents est la substance la plus dure du corps humain. Les dents de sagesse signent l'accomplissement de la personnalité, la fin de l'adolescence et l'entrée dans l'âge adulte. Sans dents, point de sourire, point d’élocution. Afin de maintenir les habiletés de la bouche et la santé, des prothèses amovibles ou des implants peuvent être adaptés. La langue est l’organe le plus puissant de l’homme. Seventeen muscles through which an artery, the motor nerves, sensory and sensory form it. It is set with buds can recognize the flavor sweet, salty, bitter, acid or glutamate. Any other flavor is perceived through the nose. The mouth is a tool to suck, sucking, biting, licking, caressing, pinching, take, spitting, blowing, sing, imitate, grinning, hissing, taste, laugh, smile, swallow, talk, cry, pout, kiss her mouth ... is very clever and has many talents. Vocal sound production, or phonation, is obtained by sending air through both vocal cords vibrate, located in the larynx, followed by amplification and resonance resonators with different bodies, such as the pharynx, oral cavity or nasal cavity. The human voice is capable of producing a wide variety of frequencies. Three criteria determine the tone of voice or voice quality, regardless of its intensity and its height: the conditions of apposition of the vocal cords, their thickness and finally anatomical characteristics of resonant cavities (pharynx, mouth and nasal cavities). Beyond the message it carries, his voice reflects a lived inside. It reflects our emotions, our moods. The Imitators have elastic vocal cords, allowing an astonishing transformation of their bodies. They are keen observers and attentive to every detail of facial expressions and voices of others. They succeeded in reproducing the reflection of our emotions, at least it is better to be amplified parodied. In music, the sound heard at the output of a musical instrument mouth is the result of amplification of a vibration that is formed through the lips. The mouth can replace the hand, as for those who quadriplegics paint. But above all, the mouth emits speech language used to human communication by constructing an expression of shared sense of our experiences. There are nearly 7,000 languages and dialects numbers worldwide. Praise for the difference in the center of the issue of Truth: the construction of meaning inflames passions.