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Digestive System

Digestive System. Organs Involved. Mouth. Oral Cavity Food enters – Ingested Roof, Walls, Floor Mucous Membrane Physical & Chemical Breakdown of food. Physical Breakdown of Food Mastication 2 years old – 20 17 to 24 – 32. 4 Types Incisors Canines Premolars Molars. Teeth. Muscle

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Digestive System

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  1. Digestive System Organs Involved

  2. Mouth • Oral Cavity • Food enters – Ingested • Roof, Walls, Floor • Mucous Membrane • Physical & Chemical Breakdown of food

  3. Physical Breakdown of Food Mastication 2 years old – 20 17 to 24 – 32 4 Types Incisors Canines Premolars Molars Teeth

  4. Muscle Moves food around in mouth Bolus Frenulum Connects tongue to floor Sensory Small Elevations Papillae Salt Sour Sweet Bitter Tongue

  5. Salivary Glands • Produce Saliva • Chemical Breakdown • Salivary Amylase • Carbohydrates • 3 Pair

  6. Pharynx • Tube • Smooth muscle • Mucous Membrane • Back of mouth • Connects with Respiratory

  7. Esophagus • Tube • Smooth Muscle • Connects Pharynx to Stomach • About 25 cm long

  8. Nasopharynx Esophagus Tongue Molars Parotid Salivary Gland Oropharynx Epiglottis Laryngopharynx Submandibular Salivary Gland Sublingual Salivary Gland Incisors Know theseParts

  9. Ingestion Digestion Physical Breakdown Chemical Breakdown Chyme Bolus Mastication Peristalsis Salivary Amylase HCl Know these terms

  10. STOMACH • Smooth Muscle • Mechanical Breakdown • Peristalsis • Gastric Glands • Chemical Breakdown • Hydrochloric Acid & Enzymes • Chyme

  11. LIVER • Under Diaphragm • Largest Gland • Produces Bile • Emulsifies Fat • Mechanical

  12. GALL BLADDER • Under Liver • Stores Bile • Fat in Duodenum • Triggers hormone Cholecystokinin CCK

  13. PANCREAS • Behind Stomach • C Shaped • Produces • Pancreatic Juice • Most Important • Digests ALL 3 foods • Insulin • Blood Stream

  14. SMALL INTESTINE • Twisted • 7m long • Smooth Muscle • Intestinal Glands • Digests Food • Villi • Increase Surface Area • Nutrients Diffuse into Blood

  15. Parts • Duodenum • Right after stomach • Pancreas & Liver Dump • Jejunum • Most Digestion • Ileum • Empties into Large Intestine

  16. LARGE INTESTINE • Chyme to Fecal Matter • Water & Salts Reabsorbed • Bacteria • Breakdown Cellulose • Produce Vitamin K • Some B Vitamins

  17. ASCENDING • TRANSVERSE • DESCENDING • SIGMOID • RECTUM

  18. APPENDIX • Start Distal Ascending Colon • Twisted • Great spot for bacterial growth

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