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Digestive system


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Digestive system

  2. 2. DIGESTION -the process of reducing food into smaller molecules that can be absorbed into the body and used by the cells in the body
  3. 3. 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
  4. 4. Types of Digestion  Chemical Phase - it needs actions of digestive enzymes into more soluble form
  5. 5. Your digestive tracts or food tube consist of the following: (1) mouth (2) esophagus (3) stomach (4) small intestine (5) large intestine (6) anus The accessory organs are (1) salivary glands (2) pancreas (3) liver (4) gallbladder
  6. 6. Digestion from the Mouth Mouth is where digestion first begins. Food starts in your mouth and you begin digestion by chewing with your teeth. Food mixes with your salvia to make a soft ball of food. Next the ball of food moves into the esophagus. Click to hear what digestion sounds like in your mouth!
  7. 7. Digestion from the Mouth  Saliva – lubricates the food and secretes an enzyme, ptyalin or salivary amylase, that convert starch to maltose
  8. 8. 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
  9. 9. 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
  10. 10. Digestion in the Esophagus  Esophagus - a tube that is about 25 cm long connecting the mouth to the stomach - carries the food down the stomach - smooth muscles move the food down toward the stomach
  11. 11. Digestion in the Stomach  Stomach – a large J-shape organ found at the end of the esophagus -large muscular sac that continues the mechanical and chemical digestion of food. - it is where partial digestion of food happens
  12. 12. Digestion in the Stomach
  13. 13. 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
  14. 14. 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
  15. 15. Digestion in the Small Intestine  It is where the final digestion and absorption of food take place 3 Major Parts Duodenum – upper 20 cm Jejunum – 2.5 meters long Ileum – longest half coiled into the abdominal cavity
  16. 16. Digestion in the Small Intestine
  17. 17. PANCREAS - it secretes hormones that regulate blood glucose -and secretes pancreatic juice that nutralizes the acid in the stomach
  18. 18. 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
  19. 19. LIVER
  20. 20. GALL BLADDER
  22. 22. LARGE INTESTINE  Undigested food goes down into the large intestine  It is where the absorption of water is happen  Keeps water inside your body so that you do not dehydrate  It is also called as colon 
  23. 23. RECTUM AND ANUS The rectum and anus are part of your large intestines. They release your waste material from the body.  Rectum – 20 to 30 cm  Anus – end of the alimentary canal
  25. 25. How can we take care of our digestive system?
  26. 26. 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
  27. 27.  step4: Be alert problems that don't go away. Symptoms such as heartburn, constipation and stomach upset can be caused by as serious as cancer. If you've 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.
  28. 28.  step6: Quit smoking!!! Among the many reasons to quit smoking, it contributes digestive problems such as heartburn, ulcers, and gallstones.