Among the top 20 elements in the periodic table, there are more than ten essential trace elements such as iron, copper, zinc, manganese, cobalt, vanadium, chromium, molybdenum, selenium and iodine. Among them, calcium, sodium, potassium and magnesium account for more than 99% of the total metal ions in human body.
Human health is closely related to these chemical elements. Oxygen is the most abundant element on the earth and the most abundant element in human body. Water consists of hydrogen and oxygen. A teenager weighing 50 kilograms has about 30 kilograms of water in his body, of which oxygen accounts for 26 kilograms, and other parts of his body that do not contain water also contain oxygen. When people breathe, they inhale oxygen. ?
People who don't drink water for a week will die, but what if they stop breathing You will be dead in seven minutes. A 13-year-old boy breathes about 20 times a minute, inhaling about 1/3 liters of oxygen each time, and needs about 9000 liters of oxygen a day. The importance of oxygen to human life is self-evident.
Extended data
There are many chemical elements in human body, and the interaction between them can not only prevent or slow down the damage caused by environmental poisons, but also achieve twice the result with half the effort by using the interaction between elements.
There are three main ways of interaction between elements: synergy, antagonism and synergy. Synergy means that the combined effect of elements exceeds the sum of individual effects of elements. For example, copper and iron have physiological synergy in human body, and anemia will occur when iron is sufficient and copper is insufficient, no matter whether it is human or animal.
Antagonism refers to the inhibition or offset of one element on the normal physiological function of another element in an organism. For example, if oranges are eaten alone, the acidity will decrease, but if they are eaten with strawberries; Coordination refers to transition metal elements, that is, a series of metal elements located in D and ds regions of the periodic table of elements, which have similar structures and properties and are easy to form complexes.
These chemical elements in human body are closely related to human health. These elements are continuously input, undergo some chemical reactions in the body, and then excreted, so that their contents in the human body remain in a relatively stable state. Too much or too little content will cause some symptoms of our body.
Take fluorine as an example, fluorine is an essential trace element for human body, and it is also an essential element for the growth and development of bones and teeth. The content of fluorine in human body is about 2.7 grams, 90% of which is in teeth and bones, and the rest is distributed in soft tissues.
Too much or too little fluorine will make calcium and phosphorus metabolism lose its normal state. If the fluorine content is too small, it may cause dental caries and osteoporosis. However, if too much fluoride enters the human body and the fluoride concentration is too high, it will react with calcium in the body to produce calcium fluoride, which will make the bones excessively hardened and oppress the nerves passing through the pores, causing pain and even paralysis.
From this perspective, human growth, development, heredity, health and so on are inseparable from the chemical elements in the human body. We should consciously ingest various chemical elements in our life to keep the balance of elements in our body, so as to keep healthy.
Baidu encyclopedia-human body elements