http://www.youtube.com/watch?v=N2diPZOtty0 Recap of supersize me http://www.oprah.com/health/Inside-Dr-Ozs-Digestive-System-Video. Flashcard Warm-up May 22nd. Peristalsis Define and Draw a picture. Flashcard Warm-up Jan. 2 nd. The Digestive System. Anatomy of the Digestive System
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The Digestive System
II. Overview of Gastrointestinal Processes
2. Proteins are broken down into amino acids by PEPSIN and TRYPSIN.
3. Lipids are broken down into fatty acids and glycerol by LIPASE
Omega-3 fatty acids have been found to be beneficial for the heart. Positive effects include anti-inflammatory and anti-blood clotting actions, lowering cholesterol and triglyceride levels, and reducing blood pressure. These fatty acids may also reduce the risks and symptoms for other disorders including diabetes, stroke, rheumatoid arthritis, asthma, inflammatory bowel disease, ulcerative colitis, some cancers, and mental decline.
4) Stomach- located on the left side of the abdominal cavity. Acts as a storage tank for food, a site of food breakdown, chemical breakdown of protein begins, delivers chyme (processed food) to the small intestine.
5) Small Intestine- The body’s major digestive organ, because nearly allnutrient absorption from food occurs in the small intestine. This muscular tube can extend 6-13 feet in a living person. There are three subdivision of the small intestine:
6)Large Intestine- Larger in diameter, but shorter than the small intestine this tube extends only 5 feet. Its major functions are to dry out the indigestible food residue by absorbing water and to eliminate these residues from the body as feces. Structures of the large intestine include:
III. Activities occurring through the digestive tract
1. Once food is placed in the mouth the physical breakdown begins by chewing. Salivary amylase also contributes to the breakdown of starches and to moisten the food to make swallowing and digestion an easier process.
2. Swallowing or deglutition is aided by the tongue, soft palate, pharynx and esophagus. Once the bolus is forced into the pharynx by the tongue we no longer have conscious control and are into the realm of our reflex activity.
3. The epiglottis closes off the trachea to ensure we do not choke on our food.
4. Food is moved down through the esophagus through peristaltic contractions.