He Shi. Alfreo. Songs Singing this: "I said where you are from a strange world, but you won't cry." Indeed, everyone knows what tears, and we It has been used to it, but it is still unclear, that is, the biological effects, ingredients, ingredients of tears, ingredients, and emotional categories. Now let's understand its mystery. Sharing the happiest moment, the meeting is painful, feeling the victory or failure of a sports competition, telling sympathy for a respectable person, yawning or smiling, etc., although their performance is different, But all are a common behavior that humans is very familiar, they will cause people to tears. Despite the basic effects of tears to protect your eyes, no one will oppose the tears that are human forms to feelings, and it is an unusual way. In addition, we also know that no one does not express his feelings, although the cause of tears is still a mystery, but because of different scientific research, people have begun to reveal it. The process of tears let us take a look at the development of health science to tears, tears, and how it is said. Tears are a colorless liquid secretion, which comes from a peer of gland in the vicinity of the endless triangle. It is wetting the entire tissue and cornea during the eyes. The overflow liquid is concentrated in the opposite triangular area (ie, the lower inside), that is, concentrates into the lacrifer, and then flows into the holes located in the nasal cavity by tissue. When this liquid is traffic, these tubes or holes cannot absorb too much liquid. At this time, the eyes of the eyes will make tears out of the eye angle. If you have a tiny dirty thing in your eyes, then it will flow out. Some liquids are excreted from the nose. At the same time, the snot mucus will also be discharged from the nose. About 90% of the ingredients in tears are water, and the remaining ingredients help eyeball surfaces moist and protect them. This remaining ingredients include the following elements: chlorine, sodium and potassium. These ingredients make the tears in another childhood feel. At the same time, they also help the end of the elements in the eye. A protein called "Muceina" is responsible for preventing evaporation of moisture, so it can avoid dry eyes. Another substance and hydrochloride that is called "betasilina" can destroy bacteria that may be loaded on the eye.
