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Occurs in the mouth, stomach, and duodenum (small intestine)
Occurs in the mouth and stomach
Begins mechanical and chemical digestion
Involves teeth, tongue, and saliva
Mixture of food bolus and gastric juices
Mucus: Protects stomach lining, adds moisture
Enzymes: Operate in acidic pH
Hydrochloric Acid (HCL): Breaks down proteins, kills pathogens
Triggered by hormone gastrin
Chemical Digestion: Breakdown into monomers
Mechanical Digestion: Churning and mixing
Epiglottis: Flap preventing food from entering airways
Pharynx: Pathway for food into esophagus
Forms food into a bolus for swallowing
Mixes and moves food
Submandibular Gland: In the lower jaw
Sublingual Gland: Under the tongue
Parotid Gland: Largest, behind ears
Increase surface area for enzymes
Break down food into smaller pieces
Not to be confused with metabolic waste
Removal of undigested food via defecation
Nutrients become part of body tissues
Each nutrient follows its own pathway into the blood
Takes place in the small intestines
Chemical Digestion
Mechanical Digestion
Mouth: Entry point for food
Encouragement to use flashcards for terminology
Video posting schedule: Tuesdays and Thursdays
Goblet Cells: Mucus secretion in esophagus and stomach
Pharynx and Epiglottis: Food passage control
Stomach: Gastrin, Gastric juice (HCL, enzymes, mucus), Bolus, Chyme
Esophagus: Peristalsis, Cardiac and Pyloric Sphincters
Salivary Glands: Parotid, Sublingual, Submandibular
Teeth: Incisors, Canines, Premolars, Molars
Final Product: Chyme
Gastric Juices
Digestion in the Stomach
Lined with goblet cells secreting mucus
Moves food via peristalsis (wave-like contractions)
Made of smooth muscle
Throat Structures
Tongue
Salivary Glands
Functions of Teeth
Egestion
Assimilation
Absorption
Digestion Types
Ingestion
Study guide: "The Cheat Sheet" for Grade 11 in English and Afrikaans
Additional video on absorption available
Processes: Ingestion, Digestion, Absorption, Assimilation, Egestion
Focus: Mouth to Stomach
Digestive system overview
Miss Angler
Additional Notes
Terminology Recap
Stomach
Esophagus
Mouth and Accessory Structures
Ingestion: Teeth Structure
Digestive System Processes
Resources
Topics Covered
Instructor
Biology Class: Digestive System Overview