The body of a multicellular organism<span>, such as a tree or a cat, exhibits organization at several levels: tissues, organs, and organ systems. Similar </span>cells<span> are grouped into tissues, groups of tissues make up organs, and organs with a similar function are grouped into an organ system.</span>
<span>Th cells in a multi cellular organism consist of more than one cell and have differentiated cells that perform different functions that are specialized.</span><span />
