Digestion Absorption and Elimination
Let's get back to Amy and her lunch mentioned in Chapter 1. She will eat her hamburger, fries, and chocolate shake, but how do these nutrients get to the tissues in the body that need them Digestion is the process of preparing foods to enter the body. This may sound strange, but any foods inside the digestive system are not yet actually in the body. The digestive system is a long tube about 30 feet when relaxed with openings at both ends Figure 4.1 . This tube is contained within the body and...
Accessory Organs The Liver Gallbladder And Pancreas
The liver and the gallbladder are two important accessory digestive organs that work with the small intestine. The liver Figure 6.3 Villi and microvilli illustrated here act to increase the surface area of the small intestine, thus increasing the potential for nutrient absorption. Villi are finger-like projections on the surface of the intestine, and microvilli are smaller projections stemming from the villi. Figure 6.3 Villi and microvilli illustrated here act to increase the surface area of...
Conversion Chart
Abdominal cavity Peritoneal , 55-56, 94 cramping, 10-11, 32, 67, 90-91 inflammation and disease, 55, 66, 68 wall, 68, 96-97 Absorption, 30, 66 carbohydrate, 67, 81 by cells, 33, 45, 57 lipid, 60-61, 63, 68, 75, 92-93, 95 of nutrients, 38-39, 49-50, 54, 56, 58, 60, 62, 64, 73, 76, 91-93, 97, 101, 104 vitamin, 22, 52, 62, 64, 68, 73, 99 Acetyl group, 26-27, 94,100,103 Acidophilus milk, 91, 94 Adenosine diphosphate ADP , 14, 25, 94 Adenosine triphosphate ATP , 16, 94, 97 production, 13-14, 25-27,...
Structure Of The Digestive Tube
Throughout the digestive tube, the walls of the organs are made up of four layers mucosa, submucosa, muscularis, and the serosa or adventitia Figure 4.2 . The innermost layer of the digestive tube is the mucosa. This layer is composed of three parts the epithelium, the lamina propria, and the muscularis mucosae. The innermost part of the mucosa is the epithelium. Most of the epithelial layer is made up of a single layer of cells called columnar epithelial cells. These cells are lined up like...
Regulating Digestion In The Stomach
Digestion in the stomach can be stimulated in a variety of ways. The thought, sight, or smell of food can stimulate the stomach to secrete digestive fluids. When food enters the Figure 6.2 Gastric pits, found in the lining of the stomach, contain special cells that secrete chemicals used in digestion. Shown here is a micrograph of gastric pits. Figure 6.2 Gastric pits, found in the lining of the stomach, contain special cells that secrete chemicals used in digestion. Shown here is a micrograph...
Websites
American Gastroenterological Association Foodborne and Diarrheal Diseases-Centers for Disease Control and Prevention National Digestive Diseases Information Clearinghouse National Institute of Diabetes and Digestive and Kidney Diseases A Voyage Through the Digestive Tract, Colorado State University
Large Intestine Anatomy And Digestion
The large intestine Figure 7.1 is a tube about 5 feet long and Figure 7.1 The large intestine consists of the cecum, colon, rectum, and anal canal. It is last place where the body will remove nutrients before the waste is excreted. Figure 7.1 The large intestine consists of the cecum, colon, rectum, and anal canal. It is last place where the body will remove nutrients before the waste is excreted. 2.5 inches in diameter. It is wider than the previous sections of the digestive tube and can store...