Health Sciences 3300A/B Midterm: Digestive System

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Alimentary canal (gi tract): development starts at embryogenesis: mouth - pharynx - esophagus (head and neck) Esophagus continues into thorax connecting to stomach etc: stomach - small intestine - large intestine (abdominal cavity, anus (pelvis) Making linear tube: moving digestive bolus of food along the tract from mouth to anus. Accessory digestive organs: teeth, tongue, salivary glands, key digestive organs (produce/store essential digestive enzymes): liver, gallbladder, pancreas. Digestive process: ingestion: entry to gi tract in oral cavity, propulsion: begins at esophagus; movement of food bolus occurs using, working together. Segmentation (localized movement): shimmying food back and forth to break up and get more sa to get more digestion, mix with juices better: mechanical digestion: chewing and churning (stomach) with saliva, chemical digestion: enzymatic (intestines, oral cavity) Wednesday, february 15, 2017: absorption: from gi lumen (hollow space of gi) to blood, defecation: eliminates indigestible material (intestine reabsorbs water and create semi solid poop)