Digestive system anatomy

Figure 6.1 Anatomy of the human gastrointestinal tract. From V.C.Scanlon and T.Sanders (1995) The digestive system. Essentials of Anatomy and Physiology, F.A. Davis Company, Philadelphia, pp. 358-385...

Figure 6.2 Section of the small intestine. (A) Section through the small intestine showing plica circulares. (B) Magnified view of a section of the intestinal wall showing the villi and the four layers. (C) Microscopic view of three villi showing the internal structure. From V.C.Scanlon and T.Sanders (1995) The digestive system. Essentials of Anatomy and Physiology, F.A. Davis Company, Philadelphia, pp. 358-385...

Fig. 4.14. Scheme of the anatomy and relationship of the pancreatic in pancreas divisum. Note the reversal of the relative size of the ducts. (Drawing adapted from F.N. Netter 1964] The Netter Collection of Medical Illustrations-Digestive System-part III)... 

Hunger and Appetite Anatomy of the Digestive System Physiology of Digestion Mouth Esophagus Stomach Small Intestine Pancreas Liver... 

Humans eat because of the sensation of hunger, and they eat certain foods, partially due to learned responses and partially due to the anatomy and physiology of their digestive system. Moreover, the digestive tract has certain controls which affect digestion and absorption. Also, some foods influence digestion and absorption. Like any system, however, there are functional problems which can occur. 

Many readers may baulk at the hard-core biological content of this Chapter. Fear not. The jargon extends only to a description of where these extraordinary thin-sections have been found in which organism, and in which part of their anatomy. To those unable to digest the jargon, look at the pictures Look again, then compare with the thin-sections of inorganic, surfactant/lipid and polymer systems sho wn in Chapters 2 and 4. 

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