Which organ system is responsible for nutrition?
                                
                                
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                                    4 min read                                
                            
                                The average human digestive tract is approximately 30 feet long, a muscular passageway where the entire nutritional journey takes place. This complex pathway is the definitive answer to the question: which organ system is responsible for nutrition? It is a well-orchestrated process involving a variety of organs that convert food into the energy and building blocks your body needs.