Characteristics of Living Things

Characteristics of Living Things - organs, such as the...

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Characteristics of Living Things Defining a living thing is a difficult proposition, as is defining “life”—that property  possessed by living things. However, a living thing possesses certain properties that  help define what life is. Complex organization Living things have a level of complexity and organization not found in lifeless objects. At  its most fundamental level, a living thing is composed of one or more  cells.  These units,  generally too small to be seen with the unaided eye, are organized into tissues. A  tissue  is a series of cells that accomplish a shared function. Tissues, in turn, form 
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Unformatted text preview: organs, such as the stomach and kidney. A number of organs working together compose an organ system. An organism is a complex series of various organ systems. Metabolism Living things exhibit a rapid turnover of chemical materials, which is referred to as metabolism. Metabolism involves exchanges of chemical matter with the external environment and extensive transformations of organic matter within the cells of a living organism. Metabolism generally involves the release or use of chemical energy. Nonliving things do not display metabolism....
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.

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