“Perplexity is the beginning of knowledge.” 11/12/2018 Title: Anat & Phys 2/20/07 Objectives: . Class Topics Lab Practical III & muscle anatomy test Digestive System “Perplexity is the beginning of knowledge.” Kahlil Gibran Monday, November 12, 2018 4:35 PM

Class Assignments Lab Practical III 2/20/07 Muscle Power Point 2/22/07 11/12/2018 Class Assignments What By When Lab Practical III 2/20/07 Muscle Power Point 2/22/07 Due this class period Due next class period Due in the future

From: http://www.agen.ufl.edu/~chyn/age2062/lect/lect_20/27_22.GIF 11/12/2018 From: http://www.agen.ufl.edu/~chyn/age2062/lect/lect_20/27_22.GIF

Steps of digestion 1. Ingestion - place food in mouth 11/12/2018 1. Ingestion - place food in mouth Conscious control 2. Mechanical processing mouth - chewing and tearing of food mastication stomach - churns food 3. Digestion breakdown of food into small organic particles Glucose from carbs, amino acids from protein

Steps of digestion 4. Secretion 5. Absorption 6. Elimination 11/12/2018 Steps of digestion 4. Secretion Enzymes, acids, saliva, buffers, bile 5. Absorption Movement of organic materials into cells 6. Elimination Defecation of wastes Fiber moves you coprophagy - eating feces - some types of rabbits

Histological Organization 11/12/2018 Histological Organization 1. Mucosa inner lining of tract secretes mucus contains endocrine cells releases into bloodstream, not tract Highly folded - more surface area microvilli - small projections to increase surface area Cells renew every 2-6 days

2. Submucosa Mainly connective tissue 11/12/2018 2. Submucosa Mainly connective tissue Blood vessels carry away nutrients Lymphatic vessels for immune response and fat transport Exocrine glands acids, buffers, enzymes Nerves - autonomic control (unconscious)

3. Muscular Smooth muscle 2 layers Move articles by peristalsis 11/12/2018 3. Muscular Smooth muscle 2 layers longitudinal circular Move articles by peristalsis

11/12/2018 4. Serosa Connective tissue Outer protective covering