Presence Or Absence Of Food, Physical Conditions Of

Presence or absence of food, physical conditions of environment, degree of its pollution - here those primary factors, with which inseparably linked organism ability to live. At the same time any organism can exist, only if the structure of its body is supported in certain, usually enough narrow limits. Great French physiologist Claude Bernard has formulated more 100 years ago this position as follows: the constancy of the internal environment is a necessary condition of a free life of an organism. The law of a constancy of the internal environment of an organism - the fundamental law of biology. I even would designate it as the First fundamental biological law (though in this case a little that speaks a serial number: all fundamental laws are characterised by that any of them cannot be broken). The metabolism based on receipt in an organism of food, water and oxygen, first of all provides a constancy of the internal environment. At monocelled beings reserves of power materials in an organism are very insignificant and according to their dependence on food receipt, as a rule, is extremely expressed.