01:119:115 Lecture Notes - Hyperglycemia, Low-Density Lipoprotein, Diabetes Mellitus Type 2
30 Jan 2014
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Includes herbivores, carnivores, and omnivores and the feeding, digestion, absorption, and final egestion (elimination) process. For both: body contractions promost egestion of undigested food particles through the mouth; digestive tract has one opening. Complex invertebrates and vertebrates with complete digestive tract. Earthworm with two openings to their digestive tract (both a mouth and anus) food digested in various regions; moved via peristalsis as more food ingested and processed. Mouth pharynx (throat) esophagus stomach small intestine large intestine rectum. Liver, pancreas, salivary glands; accessory glands that secrete digestive juices into digestive tract, and aid in digestion. Mucosa: epithelial tissue lines lumen; folded for absorption and secretion. Submucosa: outside mucosa; connective tissue + blood vessels, lymphatics, Smooth muscle (muscularis externa) nerves: inner (circular, outer (longitudinal, oblique layer (to help with churning) Peritoneum: a layer of serous connective tissue membrane (serosa: visceral covers the abdominal organs, parietal attaches to abdominal cavity, mesentary attaches to back wall of abdominal cavity to support small intestines.
