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8 Functions Necessary to Maintain Life
1.) maintain boundaries: in order for the organism's internal environment to remain distinct from the external one
2.) movement: both the muscular system and skeletal system help with this
3.) responsiveness: ability to sense change in the environment and respond to them
4.) digestion: breaking down food stuff into simple molecules
5.) metabolism: comprised of all the chemical reactions that occur in body cells
6.) excretion: process of removing wastes from the body
7.) reproduction: at the cellular and organismal level
8.) growth