The <b><a href="https://en.wikipedia.org/wiki/gastrointestinal_tract" class="extiw" title="w:gastrointestinal tract">gastrointestinal tract</a></b>, also called the digestive tract, alimentary canal, or gut, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste.
<a href="//commons.wikimedia.org/wiki/User:LadyofHats" title="User:LadyofHats">Mariana Ruiz</a>, <a href="//commons.wikimedia.org/wiki/User:Jmarchn" title="User:Jmarchn">Jmarchn</a>, <a href="//commons.wikimedia.org/wiki/User:Trengarasu" title="User:Trengarasu">Trengarasu</a>
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