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similar tissues working together to preform a function

An organ is an aggregate/collection of tissues that are adapted to perform a specific function (sometimes more than one) vital to sustaining life. In humans, organs are grouped together to form organ systems. Examples of organs are the heart, lungs, liver, kidneys. Examples of organ systems are the circulatory system (heart, blood vessels) and respiratory system (lungs, bronchioles, trachea)

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13y ago

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