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The Digestive System
Terms in this set (46)
Food supplies ________ for life processes.
Food provides the ____ _________ to build the body.
Food provides the raw materials needed to perform ____ ___________.
What are 3 examples of raw materials?
sugars, amino acids, fatty acids
What is the purpose to the digestive system?
break down large molecules in food into small molevules to get absorbed into cells.
What type of digestion does the mouth do?
What does the teeth do to the food?
break up food
What does chemical digestion involve?
What is in saliva?
What does amylase do?
digest starch, lubricate food to make swallowing easier, neutralize to prevent tooth decay and kill bacteria
What does the epiglottis do?
close the trachea when swallowing
Where does the food go after the epiglottis/trachea?
What are the involuntary muscle contractions that move food along called?
What does the stomach create?
What does chyme consist of?
digested food and liquid
What are the functions of the stomach?
food storage, disinfect food, chemical digestion, mechanical digestion
What is the enzyme in the chemical digestion of the stomach called?
What does pepsin do?
break down proteins into amino acid pieces
What does the smooth muscles of the mechanical digestion of the stomach do?
contract to mix food
What stops the stomach from digesting itself?
mucus in the stomach cells protects the stomach lining
What is the function of the small intestine?
absorb nutrients through lining
In which intestine does most of the chemical digestion occur?
How long is the small intestine?
over 6 meters
What are the 3 structures of the small intestine called?
duodenum, jejunum, ileum
What does the duodenum do?
What does the jejunum and ileum do?
What occurs in the duodenum of the small intestine?
acidic chyme from the stomach mixes with digestive juices from the pancreas, liver and gallbladder
What does the pancreas digest?
proteins, starch, fat
What do the buffets in the pancreas do?
neutralizes acid from stomach
What does the liver produce?
Where is the bile stored until needed?
What does the bile do?
break up fats
Is bile an enzyme?
What breaks down disaccharides to monosaccharides?
What breaks down dipeptides to single amino acids?
Where do some of the nutrients that are small enough after the small intestine go?
What is the function of the large intestine?
What percent of water is reabsorbed?
What can occur if not enough water is absorbed?
What can occur if not enough water/fiber is in your diet?
What does e.coli in the large intestine do?
produce vitamins and gases, feed off waste
What is in the appendix?
bacteria that can digest cellulose
What is the last section of the large intestine?
What does the rectum do?
stores waste until it is ready to be released
What does the rectum usually release?
cellulose/fiber from plants
opening to external environment
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