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  2. Biological organisation - Wikipedia

    en.wikipedia.org/wiki/Biological_organisation

    Each level in the hierarchy represents an increase in organisational complexity, with each "object" being primarily composed of the previous level's basic unit. [2] The basic principle behind the organisation is the concept of emergence —the properties and functions found at a hierarchical level are not present and irrelevant at the lower levels.

  3. Biological system - Wikipedia

    en.wikipedia.org/wiki/Biological_system

    Biological organization spans several scales and are determined based different structures depending on what the system is. [1] Examples of biological systems at the macro scale are populations of organisms. On the organ and tissue scale in mammals and other animals, examples include the circulatory system, the respiratory system, and the ...

  4. World Health Organization - Wikipedia

    en.wikipedia.org/wiki/World_Health_Organization

    The World Health Organization (WHO) is a specialized agency of the United Nations responsible for global public health. [2] It is headquartered in Geneva, Switzerland, and has six regional offices [3] and 150 field offices worldwide. Only sovereign states are eligible to join, and it is the largest intergovernmental health organization at the ...

  5. Taxonomy (biology) - Wikipedia

    en.wikipedia.org/wiki/Taxonomy_(biology)

    Theory and practice of grouping individuals into species, arranging species into larger groups, and giving those groups names, thus producing a classification. [ 2 ] A field of science (and a major component of systematics ) that encompasses description, identification, nomenclature , and classification [ 3 ]

  6. Integrative level - Wikipedia

    en.wikipedia.org/wiki/Integrative_level

    The levels concept is an intellectual framework for structuring reality. It arranges all entities, structures, and processes in the universe, or in a certain field of study, into a hierarchy, typically based on how complex their organization is. When arranged this way, each entity is three things at the same time: It is made up of parts from ...

  7. Physiology - Wikipedia

    en.wikipedia.org/wiki/Physiology

    The principal level of focus of physiology is at the level of organs and systems within systems. The endocrine and nervous systems play major roles in the reception and transmission of signals that integrate function in animals. Homeostasis is a major aspect with regard to such interactions within plants as well as animals. The biological basis ...

  8. Neonatal intensive care unit - Wikipedia

    en.wikipedia.org/wiki/Neonatal_intensive_care_unit

    The highest level of neonatal care provided occurs at regional NICUs, or Level IV neonatal intensive-care units. Level IV units are required to have pediatric surgical subspecialists in addition to the care providers required for Level III units. [38] Regional NICUs have all of the capabilities of Level I, II, and III units.

  9. Organizational chart - Wikipedia

    en.wikipedia.org/wiki/Organizational_chart

    The term "organization chart" came into use in the early twentieth century. In 1914 Brinton [8] declared "organization charts are not nearly so widely used as they should be. As organization charts are an excellent example of the division of a total into its components, a number of examples are given here in the hope that the presentation of ...