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Two examples of internal functions regulated in an organism are nutrient transport and blood flow . Organs -LRB- groups of tissues working together -RRB- perform specific functions , such as carrying oxygen throughout the body , removing wastes , delivering nutrients to every cell , and cooling the body . In order to function properly , cells need to have appropriate conditions such as proper temperature , pH , and appropriate concentration of diverse chemicals . These conditions may , however , change from one moment to the next . Organisms are able to maintain internal conditions within a narrow range almost constantly , despite environmental changes , through homeostasis -LRB- literally , `` steady state '' -RRB- ?
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.