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Definition
| system that breaks down food into its component molecules so that it can be used as energy for your body; absorbs digested material into cells; eliminates waste |
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| first stop in digestive process; contains saliva, tongue, and teeth |
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| The ______ moves food around and helps postition it b/t your teeth. |
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Definition
| Chewing is a form of __________ digestion. |
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| the physical process of breaking down food into smaller pieces |
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| Salivary glands in your mouth secrete ______. |
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Definition
| saliva contains _______, enzyme that breaks down starch into smaller molecules. |
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| a muscular tube that connects your mouth to your stomach |
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| a flap of cartilage that closes over the opening to the respiratory tract as you swallow. |
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| a series of involuntary smooth muscle contractions along the walls of the digestive tract; responsible for moving food through the digestive system |
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| the round shape food takes after chewing |
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Definition
| Digetive contractions occur in waves: first, circular muscles ______, and longitude muscles relax, then vice versa. |
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Definition
| muscular, pouch-like enlargement of the digestive tract |
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Definition
| Both ________ & ________ digestion takes place in the stomach. |
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Definition
| When muscles physically contract in the stomach, this is an example of ________ digestion. |
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Definition
| The inner lining of the stomach contains millions of glands that secrete a mixture of chemicals called _______. |
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| pepsin and hydrochloric acid |
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Definition
| Gastric juice contains ________ & ________. |
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Definition
| an enzyme that begins the chemical digetion of proteins of food in the stomach |
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Definition
| contained in gastic juice; increses the acidity of the stomach contents to pH2 |
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| The lining of the stomach sectes mucus which protects it from the acid. |
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Definition
| Why do the acids in our stomach not hurt it? |
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Definition
| How long does food stay in your stomach? |
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Definition
| From the stomach the food moves into the _______, a muscular tube about 6m long. |
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Definition
| Digetion of your meal is ________ completed in your small intestine. |
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Term
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Definition
| Carbs and proteins are futher chemically digested by enzymes secreted by your ________ & ________. |
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Definition
| the 1st 25cm of the small intestine |
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Definition
| Name the sections, in order, of the small intestine: |
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Definition
| Most enzymes and chemicals enter the duodenum through _____ that collect juices from the pancreas, liver, and gallbladder |
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| gallbladder, liver, and pancreas |
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Definition
| Food ______ pass directly through which organs of the digetive system? |
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Term
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Definition
| soft, flattened gland that secretes both digestive enzymes and hormones |
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| carbs, proteins, and fats |
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Definition
| The mixture of enzymes the pancreas secretes breaks down... |
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| akaline pancreatic juices |
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Definition
| ______________________ help neutralize the acidity of food, stopping pepsin. |
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Term
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Definition
| large complex organ with many functions |
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Definition
| What is the main function of the liver? |
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Definition
| chemical substance that helps break down fats; causes futher digestion by breaking apart large drops of fat into smaller droplets |
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Definition
| place where bile is stored |
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Definition
| How long does liquid food stay in your small intestine? |
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Definition
| single, projection on the lining of the small intestine that fuctions in the absorption of digested food; increases surface area available for absorption; absorbs digested food, then moves it into its blood vessels and into the bloodstream; link b/t circ. and digest. systems |
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Definition
| muscular tube, also called the colon; 1.5m long, 6.5cm wide |
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| As indegestible material passes through the large intsetine, water and salts are absorbed by its walls. |
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Definition
| How is water not wasted by the large intestine? |
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| bacteria in the large intestine that synthesize some B & K vitamins; stop harmful bacteria from colonizing |
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| How long is indegestible food in the large intestine? |
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| last part of the digestive system |
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| Feces is eliminated from the rectum through the _______. |
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