Biological organization is the hierarchy of complex biological structures and systems that define life using a local approach. The traditional hierarchy, as described below, extends from atoms to biospheres. At higher levels this scheme is often called the concept of environmental organizations, or as a field, a hierarchical environment. Each level in the hierarchy represents an increase in organizational complexity, with each "object" primarily consists of the previous levels of the base. The basic principle of the organization is the concept of emergence - the properties and functions found at a hierarchical level, there is no relationship at lower levels. Biological organization of life is the basis for many research areas, especially in the field of medicine. Without this necessary degree of organization, it would be much harder and probably impossible - to apply the study of the effects of various physical and chemical phenomena to diseases and physiological functioning of the body. For example, in areas such as cognitive and behavioral neuroscience could not exist if the brain is not composed of specific types of cells, and basic concepts of pharmacology could not exist if it was not known that changes at the cellular level can affect the entire body. These applications apply to environmental levels. For example, DDTs direct insecticidal action takes place at the subcellular level, but affects higher levels up to several ecosystems. Theoretically, a change in one atom could change the entire biosphere.
The North American Vascular Biology Organisation is a scientific society promoting knowledge exchange in the area of vascular biology. NAVBO organises several international scientific meetings annually which broadly cover the areas of development of blood and lymphatic vasculature, cardiovascular and lymphatic disease, vascular matrix biology and vascular bioengineering.
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