17319649
Description
Flashcards by Fatima Syeda, updated more than 1 year ago
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Created by Fatima Syeda
over 5 years ago
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| Question | Answer |
| Digestion |
Image:
Queen (binary/octet-stream)
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| What are the different body systems? | |
| What is digestion? | Digestion is the process of breaking down food into a useable form and making its nutrients available. |
| Where does digestion take place? | Digestion takes place in the digestive system. |
| What is the digestive tract? | The digestive tract is a pathway that the food takes through a series of organs. |
| What are the two types of digestion? | Mechanical and Chemical |
| What is mechanical digestion? | When the food is sliced, torn and crushed by your teeth, breaking it down into smaller pieces. No new substances made. |
| What is chemical digestion? | The large complex substances in the food are broken down into smaller chemicals by saliva in your mouth and gastric juices in your stomach. New substances are made. |
| What are the four types of teeth? |
Image:
Teeth (binary/octet-stream)
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| What is saliva? | A watery liquid produced by your salivary glands. |
| What is the function of the tongue? | The tongue rolls the food into a ball called a bolus, which is pushed down into the next part of the system, the oesophagus. |
| What is the oesophagus? | The oesophagus is a long muscular tube that starts at your mouth and ends at your stomach. |
| What is peristalsis? | The rhythmic contracting and relaxing of the muscles. |
| What is the epiglottis? | A flap of skin that closes the end of the windpipe as you swallow. |
| What are sphincters? | Along your digestive tract are rings of muscles called sphincters. |
| What is the stomach? | The stomach is shaped like a bag. Food is stored in the stomach for one to six hours. The muscular walls of the stomach contract and relax, churning up the food. |
| What do gastric juices contain? | -hydrochloric acids -mucus -digestive juices |
| What is the small intestine? | It's the largest part of your digestive tract- up to six metres long. It gets its name from its diameter which is only 3cm. |
| What is the duodenum? | The duodenum is the first part of the small intestine. Two tubes entering the duodenum carry chemicals important for digestion from the pancreas and liver. |
| What are the walls of the duodenum? | They are strong and muscular and they continue to squeeze and churn the food. This breaks the food down further and makes sure that it is thoroughly mixed with the digestive chemicals. |
| What is the pancreas? | It is not part of the digestive tract but is an organ |
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