THE PORTAL SYSTEM 2262021 SCNM ANAT 604 The
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THE PORTAL SYSTEM 2/26/2021 SCNM, ANAT 604, The Portal System 1
GENERALIZATIONS: • UNPAIRED BRANCHES OF ABDOMINAL AORTA SUPPLY GUT. • THE PORTAL SYSTEM: ORGANS SUPPLIED BY THE UNPAIRED BRANCHES OF ABDOMINAL AORTA & DRAIN TO PORTAL V. • THE CAVAL SYSTEM: ORGANS SUPPLIED BY THE PAIRED BRANCHES OF ABDOMINAL AORTA & DRAIN TO IVC. 2/26/2021 SCNM, ANAT 604, The Portal System 2
PORTAL SYSTEMS: • IN GENERAL, A PORTAL SYSTEM IS A VASCULAR ARRANGEMENT IN WHICH BLOOD FLOWS THROUGH TWO CAPILLARY BEDS BEFORE IT RETURNS TO THE HEART. 2/26/2021 SCNM, ANAT 604, The Portal System 3
ARTERIAL SUPPLY TO THE DIGESTIVE TRACT: 2/26/2021 SCNM, ANAT 604, The Portal System 4
CELIAC TRUNK • LEFT GASTRIC • HEPATIC • SPLENIC 2/26/2021 SCNM, ANAT 604, The Portal System 5
LEFT GASTRIC ARTERY • ESOPHAGEAL BRANCH • LESSER CURVATURE OF STOMACH • ANASTOMOSE WITH RIGHT GASTRIC ARTERY 2/26/2021 SCNM, ANAT 604, The Portal System 6
HEPATIC ARTERY • GASTRODUODENAL A. • RT. GASTRIC A. • HEPATIC A. PROPER 2/26/2021 SCNM, ANAT 604, The Portal System 7
HEPATIC ARTERY • GASTRODUODENAL A. – RT. GASTROEPIPLOIC A. – ANT. SUP. PANCREATICODUO DENAL A. – POST. SUP. PANCREATICODUO DENAL A. 2/26/2021 SCNM, ANAT 604, The Portal System 8
HEPATIC ARTERY • RT. GASTRIC A. – ANASTOMOSIS WITH LEFT GASTRIC A. • HEPATIC A. PROPER – CYSTIC A. (NOT VISIBLE) 2/26/2021 SCNM, ANAT 604, The Portal System 9
SPLENIC ARTERY • PANCREATIC BRS. (NOT SEEN) • SHORT GASTRIC A. • LEFT GASTROEPIPLOIC A. • SPLENIC A. PROPER 2/26/2021 SCNM, ANAT 604, The Portal System 10
SUP. MESENTERIC ARTERY • INF. PANCREATICODUODENAL AA. (NOT VISIBLE) • MIDDLE COLIC A. • RT. COLIC A. • ILEOCOLIC A. – APPENDICULAR A. • JEJUNAL & ILEAL BRS. 2/26/2021 SCNM, ANAT 604, The Portal System 11
INF. MESENTERIC ARTERY • LEFT COLIC A. • SUP. RECTAL A. • SIGMOID AA. 2/26/2021 SCNM, ANAT 604, The Portal System 12
THE PORTAL VEIN 2/26/2021 SCNM, ANAT 604, The Portal System 13
SPLENIC VEIN • • SHORT GASTRIC VV. LT. GASTROEPIPLOIC V. PANCREATIC V. INF. MESENTERIC V. 2/26/2021 SCNM, ANAT 604, The Portal System 14
SUP. MESENTERIC VEIN • RIGHT GASTROEPIPLOIC V. • PANCREATICODUODENAL VV. • JOINS WITH SPLENIC VEIN TO FORM PORTAL VEIN 2/26/2021 SCNM, ANAT 604, The Portal System 15
LEFT GASTRIC VEIN • ESOPHAGEAL VV • LESSER CURVE 2/26/2021 SCNM, ANAT 604, The Portal System 16
PARAUMBILICAL VEINS • ALONG LIG. TERES & MEDIAN UMBILICAL LIG. • CONNECT VEINS OF ANT. ABDOMINAL WALL WITH PORTAL VEIN 2/26/2021 SCNM, ANAT 604, The Portal System 17
CYSTIC VEINS • GALL BLADDER 2/26/2021 SCNM, ANAT 604, The Portal System 18
PORTAL VEIN • DIVIDES WITH HEPATIC A. • LIVER SINUSOIDS 2/26/2021 SCNM, ANAT 604, The Portal System 19
HEPATIC VEINS • DRAIN THE LIVER SINUSOIDS INTO THE INFERIOR VENA CAVA • IMPORTANT RELATION: LIVER SURROUNDS INFERIOR VENA CAVA 2/26/2021 SCNM, ANAT 604, The Portal System 20
PORTAL-CAVAL ANASTOMOSES • SOME AREAS ARE DRAINED BY BOTH THE PORTAL & CAVAL SYSTEMS. PORTAL AND CAVAL SYSTEMS ARE LINKED AT THESE POINTS • HEMORRHOIDAL VV. • ESOPHAGEAL VV. • PARAUMBILICAL VV. • DUODENAL/PANCREATIC VV • ASC. & DESC, COLON VV. 2/26/2021 SCNM, ANAT 604, The Portal System 21
PORTAL HYPERTENSION • CAUSE • CONDITIONS RESULTING FROM PORTAL HYPERTENSION – HEMORRHOIDS – ESOPHAGEAL VARICIES – CAPUT MEDUSAE 2/26/2021 SCNM, ANAT 604, The Portal System 22
