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The Strain on Digestive System |
| Nena Dockery explains how our eating habits and moving to a processed foods diet has put a strain on the digestive system. For more information, visit www.ihealthtube.com |
| Date: 2007-11-17 03:47:36 - Added by: admin1 |
| Views: 62 - Votes: 0 - Rating: 0 |
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Digestive system - mouth |
| Digestive system - mouth |
| Date: 2007-11-17 03:45:52 - Added by: taylor |
| Views: 47 - Votes: 0 - Rating: 0 |
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How the Body Works : The Digestive System |
| The Digestive System Starting at the mouth, the digestive system helps provide the energy your body needs to perform its many functions. Upon entry into a person's mouth, the teeth cut, tear, crush and grind food. In the mouth, salivary glands respond to the thought or presence of food by producing a fluid containing mucus and the enzymes amylase and maltase. The tongue then mixes the food and rolls it into a soft ball, called the bolus, which is pushed toward the esophagus. Passing through the esophagus the bolus is dropped into the stomach where gastric glands, one secreting digestive enzymes and the other secreting hydrochloric acid, begin to break the food down into smaller pieces. The stomach wall discharges mucus during this phase to protect itself against the action of the gastric acid. From there the food passes into the small intestine through the phylorus, a sphincter muscle that controls the flow of food. It is in the small intestine where a major part of digestion and absorption occurs. The intestinal wall releases enzymes which digest proteins, fats and carbohydrates. Blood and lymph vessels, which supply the small intestine, take away the final products of digestion. The lymphatics transport the fats around the body and finally release them into the bloodstream. Blood takes sugars and amino acids to the liver via the portal vein. The pancreas, like the small intestine, secretes enzymes in an alkaline juice to digest proteins, fats and carbohydrates. It also manufactures hormones which regulate the blood sugar level. From the small intestine, the digested food is received by the liver, which manufactures bile for the gall bladder. The gall bladder stores and discharges the bile, which helps to break down fats into minute droplets. Undigested food from the small intestine is then passed into the large intestine. There blood vessels supplying the large intestine carry away water extracted from the undigested waste. After passing through to the large intestine the ileocecal valve prevents digested food from returning to the small intestine. Undigested food is eliminated from the system through the anus. |
| Date: 2007-11-17 03:44:39 - Added by: admin1 |
| Views: 59 - Votes: 0 - Rating: 0 |
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Digestive System |
| A very unuseless discriptive explanation of the digestive system. Very useful if your taking the advance placement class for biology...... |
| Date: 2007-11-17 03:41:55 - Added by: taylor |
| Views: 38 - Votes: 0 - Rating: 0 |
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The Digestive System animation |
| The Digestive System animation |
| Date: 2007-11-17 03:39:11 - Added by: admin1 |
| Views: 44 - Votes: 0 - Rating: 0 |
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Graphic Australian Anti-Smoking Ad |
| Anti-smoking campaigns in Australia are getting tougher and more confronting and this latest ad is no exception. More info at www.quit.org.au |
| Date: 2007-11-17 03:35:47 - Added by: admin1 |
| Views: 29 - Votes: 0 - Rating: 0 |
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Cervical Cancer Interview |
| This is an interview on cervical cancer for a webpage competition. The link of the webpage will be added soon. Pls help out by viewing this video and visiting the webpage later. Thank you! |
| Date: 2007-11-17 03:34:08 - Added by: taylor |
| Views: 62 - Votes: 0 - Rating: 0 |
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Childhood Cancer Awareness |
| We are a group of parents from across the country with children afflicted by cancer. Our hope is to spread childhood cancer awareness and to restore funding for childhood cancer research. |
| Date: 2007-11-17 03:30:38 - Added by: admin1 |
| Views: 47 - Votes: 0 - Rating: 0 |
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Inflammatory Breast Cancer |
| Breast cancer is something women think they know all about: Look for lumps; have mammograms; see our doctors. But none of that will save you from one silent breast cancer killer that women know virtually nothing about. It's called "inflammatory breast cancer," and it's something every woman must know about. |
| Date: 2007-11-17 03:29:56 - Added by: admin1 |
| Views: 27 - Votes: 0 - Rating: 0 |
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Family MD |
| This is a family health kit designed to monitor blood pressure, blood sugar, blood cholesterol, body fat, body water content, weight, heart rate, heart murmur, and temperature. |
| Date: 2007-11-17 03:25:22 - Added by: admin1 |
| Views: 31 - Votes: 0 - Rating: 0 |
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