What are the structures of living systems and what is the concept of living systems?

In general: cells - tissues - organs - systems - individuals - populations - communities - ecosystems - biosphere.

Plants have fewer systems than animals, and single-celled organisms have only one cell, so the structures formed by cell differentiation naturally do not have: viruses do not have a cellular structure.

Sometimes there is also a sub-community, and in the case of ghosts, it is all kinds of turtles.

One more thing that ecosystems have than communities is the inorganic environment.

Plants: cardiomyocytes (cells) myocardial tissue (tissues) heart (organs) turtles (individuals) many turtles (populations) all organisms in the sea (communities) oceans (ecosystems) earth (biosphere).

Animals: Cranial nerve cells (cells) - Cranial nerve tissues (tissues) - Brain (organs) - Nervous system (systems) - People (individuals) - Communities (human populations) - All organisms in a certain area (communities) - Cities (ecosystems) - Earth (biosphere).

Animals: Cellular Structure, Tissue Structure, Organ Structure, System Structure, Individual Structure, Population, Community, Ecosystem, Biosphere.

Plants: Cell Structure, Tissue Structure, Organ Structure, Individual Structure, Population, Community, Ecosystem, Biosphere.

Unicellular organisms: Cellular structure (individual structure) Population, Community, Ecosystem, Biosphere.

a Living systems have such levels:

Cell-tissue-system-individual-population-community.

Some organisms are missing some of these links, plants don't have systems, single-celled organisms don't have tissues—systems, but all organisms have the lowest systems that are cells. Therefore, cells are the most basic living system on earth.

The highest form of a natural system is a perturbation system that can independently exchange matter and energy with its environment, and on this basis, realize internal order, development and reproduction.

Introduction

The magnificent picture of life, in the eyes of ordinary people, is all living beings, in a variety of forms. But in the eyes of scientists, they are hierarchical living systems. From the microscopic molecular level to the macroscopic group level, they all belong to different categories of living systems, with different material and structural foundations, development and change laws.

It is the highest form of natural system, which refers to a system that can independently exchange matter and energy with its environment, and on this basis, realize internal order, development and reproduction.

From largest to smallest, they are the biosphere and ecosystem.

Populations, populations, individuals, (digestive, respiratory, circulatory, etc.) systems, organs, tissues, and cells. But single-celled organisms.

Paramecium) does not have a system, organ, or tissue level, and the cells are individuals; Plants are directly composed of six organs: roots, stems, leaves, flowers, fruits, and seeds, so there is no systematic hierarchy (digestion, respiration, circulation, etc.); Viruses are living things, but they are not living systems.

The above content refers to Encyclopedia - Living System.

A living system is the highest form of a natural system, which refers to a system that can independently exchange matter and energy with its environment, and on this basis, realize internal order, development and reproduction.

There are three life roles in ecosystems, namely producers, consumers, and decomposers, which are performed by different kinds of organisms. Producers absorb solar energy and synthesize organic matter with inorganic nutrients (C, H, O, N, etc.), and store part of the absorbed solar energy in the form of chemical energy in organic matter.

The various parts of the living system are defined

1. Cell: the basic structure and functional unit of a membrane-coated organism that can independently carry out life activities (viruses do not contain cellular structures).

2. Tissue: Many cells with similar structures and similar functions and cell interstitium are called tissues.

3. Organs: Organs are called organs composed of some tissues with similar functions that can independently complete a certain life activity.

4. System: The structural level composed of multiple organs that can complete a certain type of life activity is called a system, and plants do not have a system.

5. Individual: A single organism becomes an individual.

6. Population: The level composed of all individuals of a certain organism in the same area is called population.

7. Community: The level composed of all individuals (or all populations) of all organisms in the same area is called community.

8. Ecosystem: The level composed of all organisms and their inorganic environment in the same area is called ecosystem.

9. Biosphere: The scope is the bottom of the atmosphere, most of the hydrosphere, the surface of the lithosphere, and the largest ecosystem is called the biosphere.

1. Cell: Cell is the basic structural and functional unit of living organisms, and it is also the most basic living system.

2. Tissue: It is composed of a group of cells and interstitial cells with similar morphology, structure and function.

3. Organs: Different tissues are combined in a certain order.

4. System: refers to the whole formed by the regular combination of components that interact with each other and depend on each other. Multiple organs that can work together to perform one or several physiological functions are grouped together in a certain order.

5. Individual: A creature that coordinates and cooperates with different organs or systems to complete complex life activities, such as: a person, a horse.

6. Population: In a certain natural area, all individuals of the same species are one population, for example: carp in the same fish pond or poplar in the same forest.

7. Community: In a certain natural area, all populations form a community, for example, all organisms in a forest are a community, and all organisms in a grassland are also a community.

8. Ecosystem: It can reflect the whole of life phenomena and the laws of life activities, and is hierarchical. In a certain natural area, the biological community and the inorganic environment form a unified whole with each other, such as:

Forest ecosystems, grassland ecosystems, marine ecosystems, freshwater ecosystems (divided into lake ecosystems, pond ecosystems, river ecosystems, etc.) It is further divided into biological and abiotic systems, where biological systems include animals, plants, and microorganisms.

9. Biosphere: It is composed of all organisms on the earth and the inorganic environment in which these organisms live. It is the largest living system.

Plant structure level: organs, individuals, that is, there is no system level only organs.

Single-cell structure level: cell, individual.

The structural level of single-celled organisms: it belongs to both the cellular level and the individual level.

Viruses do not have a hierarchy of structure because it has no cellular structure and belongs to non-cellular organisms, viruses do not belong to any hierarchy of living systems.