all matter on Earth commit cycles, which are called biogeochemical cycles.There are usually two cycles in the cycle of biogenic elements - geological (or large) and small (called yet another biotic), which is due to the constant circulation of matter between soil microorganisms, plants and animals.
Big cycle long, hundreds of thousands or millions of years.Rocks over time break down and erode.Then, demolished water flows, they settle to the bottom of the oceans.Part of their precipitation and organisms recoverable man from the sea, returning to land.Besides, geotectonic changes in the earth's crust (such as raising or lowering of the seabed continents) also return the matter to the land.Then the cycle of biogenic elements repeated.
Biotichesky circulation or circulation of biogenic elements - is the level of nature.Water, carbon, soil nutrients are actively involved in the life processes as organic matter to build plants and animals.When these organisms are killed, their by-products using simpler organisms - or reducing decomposers decompose into inorganic compounds and elements.Again, everything is repeated: nutrients are used by plants as a food - it happens biogeochemical cycle, which is called the cycle of nutrients.
Nutrients - a collection of chemical elements that make up living organisms and necessary for their normal life and chemical processes.It should be noted that the content of living matter in the biosphere estimated 100 billion. Tons.Changes that occur in the upper layers of the earth's crust, have an impact on living organisms, so their chemical composition is determined by the environment.
Chemistry nutrients.
In a living organism found almost all the nutrients found in seawater and earth crust.All atmospheric oxygen is a nutrient.
In living organisms, the oxygen plays a significant role, as well as hydrogen, calcium, magnesium, carbon, sodium, and iron.Among the elements is 70% oxygen, 18% carbon, 10% hydrogen.At phosphorus, calcium, potassium, sulfur, nitrogen and carbon less migratory ability than that of other elements contained in living organisms.
way of their admission into the living body are varied.But the chemistry of nutrients is that there is a "biogenic migration of atoms" (biogeochemical theory) chain: soil and water, and then the food and the people - this process involves almost all elements.From the external medium, they penetrate into the living body to a greater or lesser extent and provide the necessary elements for the biological concentration percolation normal life processes.
or biologically significant nutrients are divided into macronutrients and micronutrients.The contents of the first in living organisms is over 0.01%, while the second - less than 0.001%.
macronutrient components of the flesh of living organisms come from outside the human body;The recommended dose of consumption - 200 mg.In the human body, usually come from the food macronutrients.Trace elements, in spite of such a small number of them needed a living organism, as take part in the biochemical processes.
For good health, you need to maintain a constant internal environment qualitative and quantitative content of chemicals on a physiological level.To this way of life should be healthy, and the food - the most varied and nutritious.
