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How do the COMPONENTS of a System INTERCONNECT ?. http://www.whfoods.com/genpage.php?tname=faq&dbid=16#digestion Animation of Digestion. System. Digestive. INGESTION. FUNCTION/ PURPOSE OF SYSTEM. Digestion.
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http://www.whfoods.com/genpage.php?tname=faq&dbid=16#digestionhttp://www.whfoods.com/genpage.php?tname=faq&dbid=16#digestion Animation of Digestion
System Digestive
Digestion • breakdown of food into molecular components small enough to cross the plasma membrane
saliva saliva saliva Mechanical Digestion Same volume of food Small total surface area Larger total surface area A larger surface area speeds up digestion
Smaller pieces allow for more areas of contact for enzymes and digestive juices to act on speeding up digestion
Digestion Definition • Digestion is the breaking down of food into smaller and simpler substances • Mechanical digestion and Chemicaldigestion do this in different ways ABSORBED ELIMINATED
Absorption passage of molecules into body's interior &passage throughout the body
ELIMINATION OF WASTE LARGE INTESTINES REABSORBS WATER & SALTS
TheDigestiveSystem Mouth / Teeth Esophagus Liver Stomach Small intestine Large intestine Rectum Anus Appendix
OBSERVING DIGESTIVE ORGANS • External and internal structure of the stomach. • a. How would you describe the external appearance of the stomach? • b. What is the action (behavior)of the stomach? • c. How is the stomach designed to perform its function? • External and internal structure of the small and large intestines • a. Describe the appearance of the small and large intestines. • b. What are the main actions (behavior) of the small and large intestines? • c. How is the small intestine designed to perform its function? • 3. Determining the pH of gastric juice and bile • a. Describe the role of gastric juice and bile in digestion. • b. How is the pH of gastric juice and bile related to its role in digestion?
Image source: http://www.flickr.com/photos/liujoanne/2172007698/
INTERCONNECTION Digestion Absorption Elimination of Waste