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What does the digestive tract include?
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AH 112: Digestive
Study material for the digestive unit-B. Poole
| Question | Answer |
|---|---|
| What does the digestive system include? | the digestive tract and its accessory organs |
| What does the digestive tract include? | mouth, pharynx, esophagus, stomach, small intestine, large intestine |
| What are the accessory organs? | tongue, teeth, salivary glands, liver, gallbladder, pancreas |
| Food undergoes these three processes in the body: | digestion, absorption, elimination |
| What is ingestion? | taking in food through the mouth |
| What is mechanical digestion? | when large pieces of food get broken down into smaller pieces through chewing in the mouth, and mixing in the stomach |
| What is chemical digestion? | when water and digestive enzymes break down the molecules into smaller molecules that can be absorbed and used by cells |
| What is peristalsis? | the movements that propel the food particles though the digestive tract |
| What is absorption? | when the simple molecules that result from chemical digestion pass through cell membranes into the blood or lymph capillaries. This happens in the small intestine. |
| What is elimination? | when the food molecules that cannot be digested or absorbed are passed through the body out the anus in the form of feces |
| About how long is the digestive tract? | About 9 meters (that's about 30 feet long!) |
| How many layers does the digestive tract "tube" contain? | four |
| Regions of the digestive system are divided into these two parts: | alimentary tract, and accessory organs |
| What makes up the alimentary tract? | mouth, pharynx, esophagus, stomach, small and large intestines, rectum, and anus |
| What makes up the accessory organs? (things NOT included in alimentary tract) | salivary glands, liver, gallbladder, and pancreas |
| How many teeth do adults have? | 32 |
| Where is the stomach located? | in the upper left quadrant of the abdomen |
| What is chyme? | the semi-fluid mass into which food is converted by gastric secretion and which passes from the stomach into the small intestine (pronounced 'kime'-rhymes with 'lime') |
| The small intestine is divided into these three areas: | duodenum, jejunum, ileum |
| What does the large intestine consist of? | colon, rectum, and anal canal |
| What happens in the large intestine? | Water is absorbed and feces is eliminated |
| What are the six activities of the digestive system? | ingestion, mechanical digestion, chemical digestion, movements, absorption, and elimination |
| What are the four layers of the digestive tract? | mucosa, submucosa, muscular layer, and serous layer/serosa |
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LCC
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