The digestive system

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Human Digestive System

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The digestive system

  1. 1. THE DIGESTIVE SYSTEM Prepared by:MARICARR D. ALEGRE
  2. 2. FOOD- any substance which whenabsorbed into your bodytissues, yields materials forthe production of energy
  3. 3. DIGESTION -the process of reducingfood into smaller moleculesthat can be absorbed intothe body
  4. 4. Types of Digestion Mechanical Phase - process which food is acted upon physically or mechanically - means grinding, cutting and mashing large bits of food into fine mixture
  5. 5. Types of Digestion Chemical Phase - it needs actions of digestive enzymes into more soluble form
  6. 6. Your digestive tracts or food tubeconsist of the following: (1) mouth (2)esophagus (3) stomach (4) smallintestine (5) large intestine (6) anus The accessory organs are (1)salivary glands (2) pancreas (3) liver(4) gallbladder
  7. 7. Digestion from the Mouth
  8. 8. Digestion from the Mouth Saliva – lubricates the food and secretes an enzyme, ptyalin or salivary amylase, that convert starch to maltose 3 Salivary Glands Parotid glands Submaxillary glands Sublingual glands
  9. 9. Digestion from the Mouth Tongue – pushes the food to the back of your mouth  Bolus – a soft, mass of rounded ball of food that is being chewed
  10. 10. Digestion in the Esophagus Pharynx – an alimentary canal where food goes down after the digestion in the mouth Epiglottis- a flap of tissue that closes over the trachea to prevent the food from entering
  11. 11. Digestion in the Esophagus  Esophagus – carries the food down the stomach
  12. 12. Peristalsis – a rhythmic, wavelikemuscular action that pushesthe food downward
  13. 13. Digestion in the Stomach Stomach – a large J-shape organ found at the end of the esophagus - contraction of the muscles of the stomach causes the churning, squeezing and twisting effect - it where partial digestion of food happens
  14. 14. Digestion in the Stomach
  15. 15. Digestion in the Stomach Cardiac spincter – closes and opens to allow the flow of food from the esophagus to the stomach Pepsin – enzymes secreted in the stomach that breaks down the protein
  16. 16. Digestion in the Stomach Pyloric valve or spincter – opens and closes to allow the food getting in the small intestine Chyme – partial product retained in the stomach before transferring into the small intestine
  17. 17. Digestion in the Small Intestine 3 Major Parts 1. duodenum – upper 20 cm 2. jejunum – 2.5 meters long 3. ileum – longest half coiled into the abdominal cavity
  18. 18. Digestion in the Small Intestine  It is where the final digestion and absorption of food take place
  19. 19. Digestion in the Small Intestine Villi – small fingerlike projection in the lining of the small intestine that is used in absorption Maltase – enzymes that break down maltose into glucose
  20. 20. PANCREAS
  21. 21.  Pancreas – a digestive gland that serves 2 functions: 1. secrete hormones that regulate blood glucose 2. and secretes pancreatic juice that nutralizes the acid in the stomach
  22. 22. LIVER
  23. 23. LIVER AND BILE The liver is the largest gland in your body that carries the gall bladder Gall bladder – Produces a blue green fluid called bile
  24. 24. GALL BLADDER
  25. 25. LARGE INTESTINE
  26. 26. LARGE INTESTINE Undigested food goes down into the large intestine It is where the absorption of water is happen It is also called as colonFECES – remaining food material
  27. 27. RECTUM AND ANUS
  28. 28. RECTUM AND ANUS Rectum – 20 to 30 cm -a muscular cavity where feces is temporarily storedAnus – end of the alimentary canal
  29. 29. How can we take care of our digestive system?
  30. 30. How can we take care of our digestive system? step1: Eat right, consume protein, carbohydrates in right amount and make sure you get plenty of fiber. Eat on right time schedule. step2: Drink plenty of water and avoid sugary drinks or those that contain caffeine. Limit alcohol drinks to 2 times a day. step3: Exercise. Moving around helps things move along
  31. 31.  step4: Be alert problems that dont go away. Symptoms such as heartburn, constipation and stomach upset can be caused by as serious as cancer. If youve been suffering for more than a couple of weeks, see your doctor. step5: Get scheduled tests. your doctor will tell you when you need to have regular colonoscopy to find and remove precancerous polyps. If your doctor recommend you other tests, get those as well.
  32. 32.  step6: Quit smoking!!! Among the many reasons to quit smoking, it contributes digestive problems such as heartburn, ulcers, and gallstones.

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