Chapter 24: The Digestive System • Functions of the Digestive System o Ingesting: taking food into mouth o Secretion: release of water, acid, buffers, and enzymes into lumen of GI tract. o Mixing and propulsion: churning and movement of food through GI tract. o Digestion: mechanical and chemical breakdown of food o Absorption: passage of digestion products from GI tract into blood and lymph o Defecation: elimination of feces from GI tract. • Overview of the Digestive System o Digest...