the following is formed when a group of tissues works together to perform a common function is called an Organ.
The word organ derives from the Latin term organum (instrument, tool). These structures are objects of physiology, the area of biology that studies how organisms, systems, organs, cells and molecules perform chemical and physical functions in the body.
In this case, is correct to say that an organ is formed when a group of tissues works together to perform a common function.
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