You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Portocaval anustomoses is seen at - and explain in detail?
Ans. is 'a' i.e., Esophagus Sites of portocaval anastomosesSitePortal veinSystemic veinLower end of esophagusLeft gastricOesophageal veins (tributaries of hemiazygous vein)UmblicusParaumbilicalAbove - Superior epigastric, lateral thoracicBelow - Superior epigastric, inferior epigastricSides - Posterior intercostal, lumbarLower end of rectumSuperior rectalMiddle and inferior rectalPosterior abdominal wallSplenicLeft renal vein and other tributaries of IVC (veins of Retzius)Bare area of liverPortal radiclesDiaphragmaticFalciform ligamentParaumblicalDiaphragmaticLigamentum venosumLeft branch of portalIVC via ductus venosusPosterior vaginal wallSuperior rectalVaginal venous plexus