Week 7 & 8: Anatomy of the Lower Digestive system Flashcards
Oesophagus constriction points
- upper esophageal sphincter (C6). 2. Arch of aorta. 3. Left bprincipal bronchus (T4) 4. OesophagIAL HIATUS (T10)
Layers of muscle in Stomach
Inner oblique, middle circular, outer longitudinal
T or F: The Liver is normally palpable below the rib cage.
False
Surafaces of Liver
Diaphragmatic (right, superior, anterior, posterior). Visceral - faces downs and back
Where do diaphragmatic and visceral surfaces of liver meet
Sharp inferior border
Visceral surface of Liver - impressions
Gastric (L), duodenal, colic (R inf), Right Renal, R suprarenal , oesophagus
The Visceral surface of the Liver is related to the ___ colic flexure
Right
What demarcates Left and Right Lobes of Liver
Falciform ligament
T or F: The ligamentum teres connects liver to anterior abdominal wall
F: (Falciform ligament)
What is the thickening lower edge of falciform ligament
Ligamentum teres
Blood supply to liver
Heaptic artery (oxygenated blood) Portal vein ( high nutrients)
Veinous drainage liver?
2-3 large Heaptic veins - to IVC
Bile system - Pathway from liver
L & R hepatic ducts, common hepatic ducts joins cystic duct (from gallbladder) – bile duct, joins main pancreatic duct - hepatopancreatic ampulla (of Vater), greater duodenal papilla
T or F: Pancreas is mostly retroperitoneal
T: tail in splenorenal ligament
T or F: Spleen is part of the alimentary system
F: Lymphatic system
Position of spleen
Assoc w ribs 9-11. Long axis is oblique and parallel to Rib 10
Spleen Impressions
Gastric (sup), Renal (inf border), Colic
Gut tube parts
Fore gut (to greater duodenal papilla), Midgut (to 2/3 transverse colon), Hind gut
Supply to Foregut
Coeliac trunk - supplies spleen, liver, most pancreas, distal oesophagus etc
Drainage of foregut
Splenic vein
What connects duodenum to post wall?
Suspensory ligament of duodenum, from left and right crus
Extent of duodenum (vert bodies)
L1-L3
Internal features of duodenum
Circular folds - pliacae circularis - in all but first few cm (duodenal cap), Minor duodenal papilla (asseccory pancreatic duct), major duodenal papilla (bile _ main pancreatic duct)
What is longer? Jejunum or ilium?
Ilium
Jejunum features (compared to ililum)
Larger diameter, longer vasa recta, mesentry has less fat, thicker wall, more circular folds, closely packed. THINK - more vascular, wider, more thick, more folds = doing more digesting work so needs more blood etc
Ilium features (compared to jejunum)
Smaller diameter, shorter vasa recta, numerus arterial arcades, mesentery contains more fat, thinner wall, less circular folds, PEYERS PATCHES = think less digestion, more immune function
Features that distinguish colon
Taenia coli (3), epiploic appendages, haustra/sacculations
Curvatures of Rectum
R, L, R
Which diaphragmatic attachment lies medial to origin of suspensory ligament of duodenum?
Median arcuate ligament
