Digestive system
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Transcript of Digestive system
INGESTIONINGESTION
FUNCTION/ PURPOSE
OF SYSTEM
DigestioDigestionnbreakdown of food
into molecular components small enough to cross the plasma membrane
Mechanical DigestionSame volume of food
Small total surface areaLarger total surface area
A larger surface area speeds up digestion
saliva
saliva
saliva
Digestion• Definition
• Digestion is the breaking down of food into smaller and simpler substances
• Mechanical digestion and Chemical digestion do this in different ways
ABSORBED ELIMINATED
STRUCTURE OF SYSTEM
The Digestive System Use the words below to label the parts of the digestive system. Liver large intestine appendix anus oesophagus rectum small intestine stomach mouth
The Digestive System Use the words below to label the parts of the digestive system. Liver large intestine appendix anus oesophagus rectum small intestine stomach mouth
TheDigestiveSystem
Mouth / Teeth
Esophagus
Liver
Stomach
Small intestine
Large intestine
Rectum
Anus
Appendix
BEHAVIOR AND
INTERCONNECTION
HW
REGION OF FOOD TUBE
STRUCTURES INVOLVED
BEHAVIOR
MOUTH Teeth
Tongue
Salivary Glands
Chewing (physical/mechanical digestion)
Moves food
Chemical digestion of starch
esophagus muscles peristalsis
STOMACHStomach lining
Mixing of food with gastric juice (HCl) producing chyme
Protein digestion
Churning of food (mechanical)
SMALL INTESTINE
Duodenum
Ileum
Liver
Gall bladder
Pancreas
Final digestion
Absorption
Produces bile (digest fats/neutralize stomach acids)
Stores bile
Releases enzymes to help digestion
LARGE INTESTINE
Colon
Rectum
anus
Removal of waste; reabsorb water and salts
Storing waste
excretion
Digestion Flowchart
Assessment Criteria Points Self-Assessment
Teacher’s mark
A. Identified the main functions of the digestive system.
3
B. Listed the different structures of the 4 major areas of the digestive system
3
C. Described the behavior of each
structure 3
D. Explained how the behavior of the different structures relate and contribute to the functions of the digestive system.
3
E. Properly organized ideas in a flowchart
3
F. Poster is artistically made and neatly
presented1
Total Points 16