This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Poo-systemic shunt is not seen in which of the following abdominal structures? 
Select and explain. 
A. Liver, B. Spleen, C. Anorectum, D. Gastro Esophageal
B: Spleen
Answer: B: Spleen 
Explanation: Poosystemic shunts occur at sites where the poal system veins anastomose with systemic veins. These are alternative routes of blood flow during poal obstruction. Spleen is not known to have poosystemic shunts.Ref: Human Anatomy, B D Chaurasia, 4th Edition, Volume 2, Chapter 21, Page 270, 271; Textbook of Anatomy with Colour Atlas, Inderbir Singh, 4th Edition, Chapter 50, Page 689.