{"content":{"sharePage":{"page":0,"digests":[{"id":"55327000","dateCreated":"1341789765","smartDate":"Jul 8, 2012","userCreated":{"username":"brookefrelich","url":"https:\/\/www.wikispaces.com\/user\/view\/brookefrelich","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/ansc231-summer2011.wikispaces.com\/share\/view\/55327000"},"dateDigested":1531983599,"startDate":null,"sharedType":"discussion","title":"Rabbits- Small Intestine","description":"Small Intestine<br \/>\n   Rabbits have a rather large small intestine to ensure absorption of nutrients. The small intestine contains layers; Epithelium, connective tissue, smooth muscle layers and external layer. These layers are through out the Duodenum, Jejunum, and Ileum. <br \/>\n<br \/>\nEpithelium contains Enterocytes located on the villi which creates Enterokinase in the duodenum which is activated by the enzyme Trypsin.<br \/>\nConnective tissue is made up of the nerves, blood, and lymp with in the small intestine.  The external layer is used to support the connective tissue and protect it. The smooth muscle layer with in the small intestine undergoes peristalsis which is the movement of food through the digestive system.  <br \/>\n<br \/>\nThe Duodenum is the active site for digestion there are many enzymes that must be activated before any digestion can take place. The following enzymes are need to digest proteins: Trypsin, Chymotrypsin, Elastase, Carboxypeptidase A, Carboxypeptidase B.  The digestive protein Trypsin  comes from the pancreatic secretions which contain zymogens the inactive enzymes. Pancreatic juice also contains lipase which digest lipids and amylase which digest starch. Also used to help with digestion are some non-enzymatic material: Bile and Cholesystokinin. Bile is secreted by the gall bladder and is used to emulsify lipids. Cholesystokinin is a hormone that is stimulated by fat and protein entering the duodenum which then causes the pancreas and gallbladder to contract.<br \/>\nThe Jejunum is where most of the nutrient absorption being that the villi are the longest here creating more surface area. Their are three mechanisms of absorption used: simple diffusion, facilitated diffusion, and active transport.<br \/>\n<br \/>\nThe Ileum is used to absorb the last of the nutrients.","replyPages":[{"page":0,"digests":[],"more":0}]}],"more":false},"comments":[]},"http":{"code":200,"status":"OK"},"redirectUrl":null,"javascript":null,"notices":{"warning":[],"error":[],"info":[],"success":[]}}