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The Digestive System
Transcript of The Digestive System
We need food to give us energy, to grow and repair. The digestive system breaks down the food to its simplest form. The broken-down food is then absorbed into the bloodstream from the small intestine and the nutrients are carried to each cell in the body.The digestive system is a set of organs that make food into the needed nutrients that are moved into the body and moves the unused waste out of the body. It is necessary to have good health because if the digestive system shuts down, the body cannot get rid of waste.
The digestive system has two main reasons to be there: to convert food into nutrients your body needs, and to get rid of the the body waste. To do its job, the system needs the help of different organs throughout the body, including the mouth, stomach, intestines, liver and gallbladder.
1. The length of your entire digestive system from mouth to anus is approximately 9 metres.
2. It takes 6-8 hours for food to digest.
3. The large intestine is approximately 1.52 - 2.43 metres in length.
4. Gases that build up in your large intestine cause flatulence. It usually takes about 30 to 45 minutes for these gases to pass through your system.
5. 1.7 liters of saliva is produced each day from the mouth.
The food is chewed up by the teeth and moistened with saliva to make it easy to swallow. Saliva also has a special chemical, called enzyme, which starts breaking down carbohydrates into sugars.
The Digestive System
The digestive system begins at the mouth and ends at the anus. It is like a long, muscular tube, which can reach up to 10 meters long, with digestive organs attached along the way.
Once swallowed, muscular contractions of the esophagus make the ball of food go down into the stomach.
The food passes through the small muscle ring, into the stomach. Here it is mixed with gastric juices. The stomach is a muscular bag and it mixes the food to help break it down mechanically as well as chemically. The food is then squeezed through a second muscle ring, into the first part of the small intestine, called the duodenum.
The Small Intestine
Once in the duodenum, the food is mixed with more digestive enzymes from the pancreas and bile from the liver. Food is then squeezed into the lower parts of the small intestine, called the jejunum and the ileum. Nutrients are absorbed from the ileum, which is lined with millions of finger-like projections called villi. Each villus is connected to a mesh of capillaries. This is how nutrients pass into the bloodstream.
The pancreas is one of the biggest glands in the human body. As well as digestive juices, it releases a hormone called insulin. Insulin helps to control the amount of sugar in the blood. Diabetes is a condition caused by problems with insulin production.
The liver has heaps of different jobs in the body, including:
Breaking down fats, using bile stored in the gall bladder.
Processing proteins and carbohydrates
Filtering and processing impurities, drugs and toxins.
Generation of glucose for short-term energy needs from other compounds like lactate and amino acids.
The large intestine
The route of the large intestine makes a large upside down "U."
THANKS FOR WATCHING
Thanks for Watching!
by jordan, emily and krishna
wHAT FOODS HELPs our body
Once all the nutrients have been absorbed, the waste is moved into the large intestine, or bowel. Water is removed and the waste is stored in the rectum. It can then be passed out of the body through the anus.
To avoid upset tummies there are some foods you should try to have as little of as possible.
Some of the worst kinds of food you can have are both high-fat and fried food, spicey cuisine, alcohol and corn.
These foods can cause reflux and heartburn.
Some foods that help your digestion are yogurt,lean meat and fish and last of all whole grains.
The Digestive System is like a meat grinder because it grinds up food.
2. The esophegus is like a small tube that is at the start of the Digestive System and ends at the bottom.
3. The small intestine looks like Spaghetti.
4. The mouth is also like a meat grinder because it crushes up the food so it fits in the esophagus.
5. The gallbladder is like a small pear shape organ inside your body.
The gallbladder is a small sac that holds bile, a digestive juice produced by the liver that is used in the breakdown of dietary fats. The gallbladder extracts water from its store of bile until the liquid becomes highly concentrated. The presence of fatty foods triggers the gallbladder to squeeze its bile concentrate into the small intestine.