Digestive System - breakdown food to
facilitate effective transport of nutrients
to different parts of the body to be used...
Mouth - where mechanical breakdown
occurs
 Teeth - tear food into several pieces
 *Mastication - action of chewing or
gr...





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Subparts:
Incisors, Canines - bite and tear down food
Molars - grind food
Parotid, Submandibular, Buccal...
Pharynx/throat - where food is placed
after swallowing
 Esophagus - conveyor of food from
pharynx to the stomach
 *Peris...
Subparts:
 Enzymes/Excretions:
 Mucin - lubricate esophagus
 Residue: Masticated food

Stomach - principal organ of digestion
 Subparts:
 Pylorus - where chyme passes
 Pyloric sphincter - where chyme exits ...

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Enzymes/Excretions:
*Gastric juice
Hydrochloric acid - activator of
pepsinogen, destroy microorganisms
Zy...



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Small intestine - where most of the nutrients
are absorbed
Subparts:
Duodenum - produce enzyme that signals...
Enzymes/Excretions:
 Lipase - digests fats and oils
 Glucagon - raises the amount of sugar
 Insulin - lowers down amoun...
Large intestine/colon - where water is
absorbed
 Subparts:
 Caecum, Ascending colon, Transverse
colon, Descending colon,...

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Rectum - where feces is stored
*Bowel movement - rectum expands to
hold the feces until nerves around tell...
Physical digestion
 Chemical digestion

Ingestion
 Absorption
 Assimilation
 Excretion

-monosaccharides: glucose, fructose
 -dissaccharides: lactose, sucrose,
maltose
 -polysaccharides: glycogen, starch,
cel...
Place of digestion:
 -mouth (salivary gland releases salivary
amylase)
 -small intestine (pancreas releases
pancreatic a...
-amino acids
 Enzyme:
 -pepsinogen that becomes pepsin
 -trypsinogen that becomes trypsin

Place of digestion:
 -stomach (releases
pepsinogen, activated by HCl to
become pepsin)
 -duodenum (pacreas releases
tryp...
-fats, oils, triglycerides
 Enzyme: lipase, bile
 Place of digestion:
 -mouth (salivary gland releases lingual
lipase)
...
05 digestive system
05 digestive system
05 digestive system
05 digestive system
05 digestive system
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05 digestive system

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05 digestive system

  1. 1. Digestive System - breakdown food to facilitate effective transport of nutrients to different parts of the body to be used for energy and other body functions  Digestive tract - is also called alimentary canal, alimentary tract or gastrointestinal tract 
  2. 2. Mouth - where mechanical breakdown occurs  Teeth - tear food into several pieces  *Mastication - action of chewing or grinding food 
  3. 3.         Subparts: Incisors, Canines - bite and tear down food Molars - grind food Parotid, Submandibular, Buccal - salivary gland, secrete saliva Enzymes/Excretions: Amylase - digests carbohydrates Residue: No residue yet; Food
  4. 4. Pharynx/throat - where food is placed after swallowing  Esophagus - conveyor of food from pharynx to the stomach  *Peristalsis movement tiny, rhythmic, wavelike contractions 
  5. 5. Subparts:  Enzymes/Excretions:  Mucin - lubricate esophagus  Residue: Masticated food 
  6. 6. Stomach - principal organ of digestion  Subparts:  Pylorus - where chyme passes  Pyloric sphincter - where chyme exits the stomach and enters small intestine 
  7. 7.         Enzymes/Excretions: *Gastric juice Hydrochloric acid - activator of pepsinogen, destroy microorganisms Zymogen - inactive form of proenzyme Pepsinogen - inactive form of pepsinogen Mucin - protect stomach lining Residue: Chyme
  8. 8.        Small intestine - where most of the nutrients are absorbed Subparts: Duodenum - produce enzyme that signals pancreas and liver to release its secretion Jejunum - where absorption mainly takes place Ileum - where Vitamin B12 and bile is being absorbed Villi - increase surface area for absorption Pancreas - secretes glucagon and insulin
  9. 9. Enzymes/Excretions:  Lipase - digests fats and oils  Glucagon - raises the amount of sugar  Insulin - lowers down amount of sugar  Somatostatin - inhibits production of more enzymes  Residue:  Chyme 
  10. 10. Large intestine/colon - where water is absorbed  Subparts:  Caecum, Ascending colon, Transverse colon, Descending colon, Sigmoid colon - parts of large intestine  Enzymes/Excretions:  Residue:  Feces 
  11. 11.        Rectum - where feces is stored *Bowel movement - rectum expands to hold the feces until nerves around tell the brain that we have to push it out of our body. Anus - where feces/bowels exit our body Subparts: Enzymes/Excretions: Residue: Feces
  12. 12. Physical digestion  Chemical digestion 
  13. 13. Ingestion  Absorption  Assimilation  Excretion 
  14. 14. -monosaccharides: glucose, fructose  -dissaccharides: lactose, sucrose, maltose  -polysaccharides: glycogen, starch, cellulose  Enzyme:  -amylase: lactase, sucrase, maltase 
  15. 15. Place of digestion:  -mouth (salivary gland releases salivary amylase)  -small intestine (pancreas releases pancreatic amylase)  After digestion:  -stored in the liver to be used as energy for all body processes in the cells, tissues and organs 
  16. 16. -amino acids  Enzyme:  -pepsinogen that becomes pepsin  -trypsinogen that becomes trypsin 
  17. 17. Place of digestion:  -stomach (releases pepsinogen, activated by HCl to become pepsin)  -duodenum (pacreas releases trypsinogen)  After digestion:  -become components of hair, skin, eyes, muscles, body organs and connective tissues 
  18. 18. -fats, oils, triglycerides  Enzyme: lipase, bile  Place of digestion:  -mouth (salivary gland releases lingual lipase)  -small intestine (pancreas releases pancreatic lipase)  After digestion:  -it will serve as stored energy 

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