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  2. Bioecological model - Wikipedia

    en.wikipedia.org/wiki/Bioecological_model

    The microsystem should be delineated to include distinct forms in which an individual lives: physical microsystem and virtual microsystem. The role of the macrosystem, specifically the cultural influence of digital technology, should be emphasized in understanding human development.

  3. Biogeochemical cycle - Wikipedia

    en.wikipedia.org/wiki/Biogeochemical_cycle

    A biogeochemical cycle, or more generally a cycle of matter, [1] is the movement and transformation of chemical elements and compounds between living organisms, the atmosphere, and the Earth's crust. Major biogeochemical cycles include the carbon cycle , the nitrogen cycle and the water cycle .

  4. Biological system - Wikipedia

    en.wikipedia.org/wiki/Biological_system

    On the organ and tissue scale in mammals and other animals, examples include the circulatory system, the respiratory system, and the nervous system. On the micro to the nanoscopic scale, examples of biological systems are cells, organelles, macromolecular complexes and regulatory pathways.

  5. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    The adult human body averages ~53% water. [7] This varies substantially by age, sex, and adiposity. In a large sample of adults of all ages and both sexes, the figure for water fraction by weight was found to be 48 ±6% for females and 58 ±8% water for males. [8]

  6. Microsystem - Wikipedia

    en.wikipedia.org/wiki/Microsystem

    A microsystem is a self-contained subsystem located within a larger system. It generally constitutes the smallest unit of analysis in systems theory.

  7. Living systems - Wikipedia

    en.wikipedia.org/wiki/Living_systems

    Bailey states that Miller's theory is perhaps the "most integrative" social systems theory, [10] clearly distinguishing between matter–energy-processing and information-processing, showing how social systems are linked to biological systems. LST analyzes the irregularities or "organizational pathologies" of systems functioning (e.g., system ...

  8. Biological process - Wikipedia

    en.wikipedia.org/wiki/Biological_process

    Biological processes are regulated by many means; examples include the control of gene expression, protein modification or interaction with a protein or substrate molecule. Homeostasis: regulation of the internal environment to maintain a constant state; for example, sweating to reduce temperature

  9. Microbial metabolism - Wikipedia

    en.wikipedia.org/wiki/Microbial_metabolism

    Microbial metabolism is the means by which a microbe obtains the energy and nutrients (e.g. carbon) it needs to live and reproduce.Microbes use many different types of metabolic strategies and species can often be differentiated from each other based on metabolic characteristics.