GI Flashcards
The parts of esophagus?
cervical
thoracic
abdominal
type of muscles of esophagus?
inner circular and outer longitudinal
upper 1/3 striated
middle 1/3 mixed
lower 1/3 smooth
the constrictors of esophagus?
- cervical, at pharyngoesophageal junction C5 (cricoid cartilage.
- thoracic/aortic
- diaphragmatic (formaed by the right crus)
shincters of esophagus?
upper ( formed by cricopharyngeus part of cricoid cartilage)
and lower ( formed by right crus and phrenicoesophegal lig)
laimer trigone?
proximal part of esophagus thats absent of longitudinal muscles.
where does esophagus meet the stomach?
at cardial orfice Th 11 or 7th costal cartilage
arterial supply of esophagus?
- cervical part: branch from inferior thyroidal artery (thyrocervical trunk)
- thoracic: branch of left and right bronchial a. (aorta)
- abdominal part: Left gastric and left inf phrenic
innervation of esophagus?
vagus nerve
location of stomach?
left hypochondrium and epigstric region.
how many layers are fused at greater curvature of stomach?
6
4 due to 2 double layer of peritoneum
2 due to gastrocolic lig
parts of stomach?
cardia (T-11)
fundus (
body
pyloric part ( pyloric antrum and pyloric canal)
whats angle of his?
cardial notch wich functions as an extra valve in the stomach preventing reflux of gastric juice.
muscular layer of stomach?
inner circular middle longitudinal outer oblique ( from cardia to angular notch only!)
ligaments of stomach?
- hepatogastric lig ( contains R and L gastrig a. v. )
- gastrocolic lig ( contains anastomosis b/w L and R
gastroepiploic a.) - gastrosplenic lig: ( continues further to the left as phrenicsplenic lig, contains short gastric abit of L gastroepiploic.
arterial supply of stomach?
- Left gastric (celiac trunk)
- Short gastric a. (splenic a)
- posteriro gastric a (splenic a.)
- left gastroepiploic a. (splenic a)
- right gastric ( proper hepatic a)
- right gastroepiploic a. ( gastroduodenal a.)
venous drainage of stomach?
- Left gastric vein–>portal v.
- right gastric vein–>portal v.
- short gastric vein–> splenic v.–>portal v.
- left gastro-epiploic v.–> splenic v.
- right gastroepiploic v. —> superior mesentery v.
innervation of stomach?
vagus and greater splanchic n.
Parts of small intesitine?
duodenum, jejunum, ileum
position of duodenum?
L1-L3
ligaments of duodenum?
suspensory ligaments of treitz
parts and their level of duodenum?
- sup horizontal (L1) ( attached to hepatoduodenal lig)
- descending ( L1-L3) ( contain junction of foregut and
hindgut) (retroperitonel) - Inf horizontal (L3)
- Ascending (l3-L2)
flexures of duodenum?
- superior( at sup horizontal going to descending)
- Inf descending–> inf horizontal
arterial supply of duodenum?
- superior (ant/post) pancreatico duodenal a. (gastroduodenal a)
- inferior pancreaticoduodenal a. ( SMA)
- gastroduodenal a. ( common hepatic a.)
- supraduodenal a. ( gastroduodenal a.)
first riolan arch?
anastomosis b/w sup and inf pancreaticoduodenal arteries ( around head of pancreas)
venous drainage of duodenum?
pancreaticoduodenal veins–> superior mesenteric v.
innervation of duodenum?
vagus and greater and lesser splanchnic
where does jejunum begin?
at the duodejojejunal flexure
difference b/w jejunum and ileum?
jejunum less prominent arterial arches and longer vasa recta then ilieum.