BIOL 1080 Chapter Notes - Chapter The Digestive System: Gastric Acid, Gastric Glands, Salivary Gland

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239: digestive system: consists of the gastrointestinal tract, into which various accessory glands release their secretions, gastrointestinal (gi) tract: a long, hollow tube, in the digestive system, into which various accessory glands release their secretions. Receives food; contains teeth and tongue; tongue manipulates food and monitors quality. Area that both food and air pass through; role in swallowing. Muscular tube that transports food from mouth to stomach. J-shaped muscular sac for food storage; secretes gastric juice (pepsin and hcl) Long, muscular tube where digestion is completed and most nutrients and water are absorbed. Final tubular region of gi tract; absorbs water and ions; houses bacteria; forms and expels feces. Teeth tear and crush food into smaller pieces. Churning of stomach mixes food with gastric juice, creating liquid chyme. Segmental contractions mix food with intestinal enzymes, pancreatic enzymes, and bile. Small intestine proteins and polypeptides into smaller fragments. Small intestine triglycerides (fats) into fatty acids and glycerol.

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