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digestive system
| Question | Answer |
|---|---|
| all food that a person eats goes through four steps. _____,______,_____,and ______ | ingestion, digestion, absorption, and elimination |
| ________ is the act of eating, or putting food in the mouth | ingestion |
| ________ is the mechanical and chemical break down of food into small particles and molecules that your body can absorb and use. | digestion |
| _______ occurs when the cells of the digestive system take in small molecules of digested food | absorption |
| ________ is the removal of undigested food and other wastes from the body. | elimination |
| in _______________ food is physically broken into smaller pieces | mechanical digestion |
| in _______________ chemical reactions break down smaller pieces of food into small molecules | chemical digestion |
| ___________ are proteins that help break down large molecules into smaller molecules | enzymes |
| enzymes also speed up the rate of _________________ . but enzymes don't change the reaction | chemical reaction |
| the digestive system produces enzymes that are specialized to help break down each type of food __________ | molecules |
| the digestive system is made of two parts: the _________ and the other organs that help the body break down and absorb food | digestive tract |
| mechanical digestion of food begins in the __________ | mouth |
| ________ contains an enzyme that helps break down carbohydrates | saliva |
| the ________ is a muscular tube that connects the mouth to the stomach | esophagus |
| food moves through the esophagus and the rest of the digestive tract by waves of muscle contractions, called ______________ | peristalsis |
| the __________ is a large, hallow organ that stores food and aids in chemical digestion | stomach |
| the stomach contains an __________ fluid called gastric juice. as food mixes with gastric juice in the stomach, it forms a thin, watery liquid called ________ | 1. acidic 2. chyme |
| gastric juice contains ______, an enzyme that helps break down protein | pepsin |
| chemical digestion of proteins, carbohydrates, nucleic acids, and fats takes place in the first part of the small intestine called the ________ | duodenum |
| the folds of the small intestine are covered with finger like pro- jections called _________ | villi |
| __________ move from the small intestine into the blood through small blood vessels in the villi | nutrients |
| the pancreas, ________ and gall bladder produce substances that enter the small intestine and help with chemical digestion | liver |
| as food travels through the large intestine, __________ is absorbed. | water |
| materials that pass through the large are the __________ products of digestion | waste |
| _____________in the intestines digest food. they also import _________ and amino acids | 1. bacteria 2. vitamins |
| nutrients from the digestive system are necessary for other body systems to maintain ______________ | homeostasis |
| blood in the circulatory system carries nutrients from digestion to all other body systems, providing these other systems with materials that contain _________ | energy |
| why are bacteria in the intestines essential for proper digestion? | bacteria in the intestines digest food and produce important vitamins and amino acids. |
Created by:
akoen2