RT Book, Section
A1 Hasler, William L.
A1 Owyang, Chung
A2 Loscalzo, Joseph
A2 Fauci, Anthony
A2 Kasper, Dennis
A2 Hauser, Stephen
A2 Longo, Dan
A2 Jameson, J. Larry
SR Print(0)
ID 1198711238
T1 Approach to the Patient with Gastrointestinal Disease
T2 Harrison's Principles of Internal Medicine, 21e
YR 2022
FD 2022
PB McGraw-Hill Education
PP New York, NY
SN 9781264268504
LK accessmedicine.mhmedical.com/content.aspx?aid=1198711238
RD 2024/04/23
AB The  gastrointestinal  (GI)  tract  extends  from  the  mouth  to  the  anus  and  is  composed  of  organs  with  distinct  functions.  Sphincters  that  assist  in  gut  compartmentalization  separate  the  organs.  The  gut  wall  is  organized  into  distinct  layers  that  contribute  to  regional  activities.  The  mucosa  is  a  barrier  to  luminal  contents  or  a  site  for  fluid  and  nutrient  transfer.  Smooth  muscle  in  association  with  the  enteric  nervous  system  mediates  propulsion  between  regions.  Many  GI  organs  possess  a  serosal  layer  that  provides  a  supportive  foundation  and  permits  external  input.