biological system - a combination of elements that are connected and depend on each other, forming a single unit that performs a specific function and interact with the environment or other elements and systems.
main functional elements of biological systems have different levels of the organization and the appropriate classification.These include both individual molecules and cells, tissues and organs, and whole organisms, their populations and even entire ecosystem.All of these elements, starting with the organismic level, are able to exist on their own, forming the respective levels of evolution, which is the highest manifestation of Biosphere rank.
I must say that every biological system, in spite of the various constituent elements, characterized by the following features:
- relevant responsibilities;
- it is characterized by a certain continuity;
- consists of separate subsystems;
- ability to adapt, which is the appropriate changes in response to different environmental exposures;
- addition, the biological system is characterized by relative stability and the ability to develop, the constant regeneration of damaged components as well as complete or partial renewal and self-healing.
relatively homogeneous biological system is the level of organization of living for which the nature of the type of interaction of the elements, as well as spatial and temporal criteria of the processes that occur in it.
concept of different levels of organization of living matter became widespread in the mid-20th century.It includes differentiation of all life on the planet into separate discrete and related structural group.
It should be noted that the biological system is characterized by the principle of hierarchy - different levels of organization of a specific form a pyramid in which every structural level is the next, but a higher rank.Moreover, all levels of the organization interact and influence each other.
Since ancient times, began to develop biological systematics - a discipline whose purpose is the development of certain principles of the classification of all living organisms that can be used in the construction of biological systems.
Today the classification of plants and animals is carried out by the above-mentioned principle of hierarchy: some individuals - species that are combined in generations - the family - order or detachment - classes that form the relevant departments, - the types that are part of the kingdoms.Thus, a particular plant or animal should apply to each of the seven categories of classification.
new concept is the term "superkingdom" or biological domain.Behind him every biological system is still classified and superkingdom eukaryotes, bacteria and archaea.
worth noting that biological systems has a certain feature: living organisms are related not only among themselves but also with the environment, which manifests itself in a general exchange of energy, matter and information.Life without this interaction is not possible.
