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amazonia.fiocruz.br/scdp/essay/mormon-bank-utah/the-digestive-tract-of-digestion.php

The digestive system is a complex system that plays a vital role in the absorption of nutrients essential to the body. How does it work exactly? What are the ...

www.saintlukeskc.org/health-library/anatomy-digestive-system

As food moves along the digestive tract, it is digested. This means it's changed into substances that can be absorbed into the bloodstream.