L01 Topography & Overview of Digestive System

Digestive System

Alimentary Canal - Muscular tube: Mouth → Anus

• Functions:
• Process:
• Layers: Sup → Deep
• Viscerae
• Areas of Dual Arterial Supply
  • Duodenum, Transverse Colon, Rectum

L02 Function of Mouth & Oesophagus

Digestion: Conversion of Dietary Nutrients into a form Small Intestine can Absorb

Mouth

• Mastication - Increases Surface Area for Digestion
• Initiate Metabolism - Beginning Carbohydrate & Lipid Metabolism
  • Salivary Amylase, Lipase
• Lubrication - Soften Bolus
• Cytoprotection - Protects Visceral Mucosa from damage
• Hydration - Prevents Cell Dehydration & Death
• Salivary Glands
• Deglutition

Oesophagus

• Gravity Fed tube...? No