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The Digestive System
Transcript of The Digestive System
Gastritis is a condition in which the stomach lining known as the mucosa is inflamed.
Many people with gastritis do not have any symptoms, but some people experience symptoms such as: upper abdominal discomfort or pain, nausea, and vomiting.
Medications that reduce the amount of acid in the stomach can relieve symptoms that may accompany gastritis and promote healing of the stomach lining.
EBear, Souvlaki, and Catfish
This is where mechanical breakdown of food (chewing) occurs, to increase the surface area of food, and make it easier to swallow.
Removes toxins and unusable materials from food, and produces bile that contains vitamins A and B.
The esophagus moves food to the stomach with smooth muscle contractions called peristalsis.
Literally, “orange-yellow” in Greek. A degenerative disease of the liver that often develops in chronic alcoholics, but can have other causes. The name refers to the gross appearance of the organ.
The stomach is responsible for the chemical breakdown of food. The stomach helps digestion after the food is swallowed.
Literally means “yellow” in French. Yellowing of the skin and whites of the eyes from a backup of bile metabolic by-products from the blood into body tissues. May result from blockage of the ducts draining bile from the liver into the intestines or excessive breakdown of red blood cells. Hemoglobin from destroyed RBCs is broken down, and in part, ends up in bile secretions.
Helps speeds up reactions in the body by releasing enzymes and hormones. Some examples of enxymes and hormones are insulin and glucagon. Insulin and glucagon serve the function of regulating your blood sugar level.
The gall bladder puts bile into the small intestines, which breaks down fats. Bile acts like dishsoap on a water slide by helping with digestion and moving the bolus quicker.
Inflammation of the lining of the abdominal cavity. Before antibiotics, people would die from peritonitis if an inflamed appendix burst.
It re-absorbs water into the cells to help you poop.
All of the nutrient absorption happens in the small intestine because of the huge amount of surface area. The small intestine, when stretched out, is about 20 feet (6m). Located on the small intestine are extentions called villi, and on those microvilli. The job of these is just to extend the surface area of the small intestine to allow for more absorbtion of nutrients.
A chronic inflammatory disease primarily of the bowel. Typical symptoms are abdominal pain, weight loss, diarrhea. There may also be rectal bleeding that can lead to anemia.
The final section of the large intestine, ending at the anus.
1. Dry out your mouth with paper towel.
2. Enjoy looking at delicious foods.
3. Notice how you salivate at the thought of food.
Why does this happen???
Science Notes (The Digestive System)
Ms. Jacobs (Thanks for the Experiment Idea)
When you think about food, your brain tells the salivary glands in your mouth to prepare for the reception of food. The function of saliva is to keep the food together in one bolus so that it is easy to transport around the body.
More on the Experiment
This experiment shows us that food is a very important part of our life. It also shows us that our mouths are a very important part of our digestive system, because the saliva that is released contains enzymes and lubricants that help the digestive process.