Digestive System I Flashcards
what are the organs of the digestive tube
mouth, pharynx, esophagus, stomach, small and large intestine, rectum, anus
what are the accessory organs used in digestion
salivary glands, liver, gall bladder, pancreas
oral cavity is otherwise known as the
buccal cavity
what are the three salivary glands
- parotid
- submandibular
- sublingual
below zygomatic arch and anterior to ear, just beneath skin with single ducts that open lateral to 2nd upper molar (stensons duct)
parotid gland
parotid gland is innervated by what
parasym - CN IX
in the floor of the mouth on inner surface on the sides of the frenulum, posterior to the lower incisors
submandibular gland
submandibular gland is innervated by what
parasym - CN VII
beneath the mucosa on the floor of the mouth with numerous ducts to open along the sides of the tongue
sublingual gland
sublingual gland is innervated by what
parasym - CN VII
esophagus extends from ____ and vertebra level ___ and terminates in the _____ at the ___
start: pharynx @ C6
end: cardial orifice @ stomach
what are the three esophagial potential restrictions
- upper esophageal sphincter
- broncho-aortic constriction
- lower esophageal sphincter
cricopharyngeus muscle which demarcates the beginning of the esophagus (potential restriction)
upper esophageal sphincter
area where the esophagus is first crossed by the arch of the aorta and then by the left main bronchus (potential restriction)
broncho-aortic constriction
@T10 located where the esophagus passes through esophageal hiatus in the diaphragm. prevents reflux of gastric contents (potential restricition)
lower esophageal sphincter
the esophagus is a ____ derivative
foregut
the abdominal part of the esophagus extends from the diaphragm to the cardiac region of the stomach (______) 1.25cm
cardial orifice)
the esophagus is attached to the diaphragm by way of the _____
phrenicoesophageal ligament (allows movement during breathing)
the left border of the esophagus is delineated from the stomach by the
cardiac notch
what anatomical line lines the abrupt change in the epithelial lining of the esophagus
zig zag line (z line)
what vertebral landmark is the z line located
@ T11
esophagus is lined with ____ epithelium above diaphragm
stratified squamous epithelium
below the diaphragm the esophagus is lined with ____ epithelium
columnar
what artery supplies the esophageal branch of the esophagus
left gastric artery
what artery supplies the lower portion (abdominal portion) of the esophagus
left inferior phrenic artery
portal venous return of the esophagus via liver
left gastric vein (alcoholic cirrhosis)
systemic venous return of esophagus through the ___
azygos vein
para and sym innervation of esophagus
para - vagus nerve CN X
sym - greater and lesser splanchnic nerves
what are the 5 parts of the stomach
- cardia
- fundus
- cardial notch
- body
- pyloric
surrounds the superior orifice of stomach
cardia
superior portion of the stomach that is associated with the diaphragm
fundus
found between the esophagus and fundus of the stomach
cardial notch
central portion between the fundus and pylorus (largest part of stomach)
body
funnel shaped inferior region of the stomach
pyloric
largest part of the pyloric funnel is the
pyloric antrum
the narrow inferior part of the pyloric is the
pyloric canal
distal sphincter region of the stomach that controls the discharge of stomach contents
pylorus
ventral aspect of the primitive foregut - right border of stomach
lesser curvature
dorsal aspect of the primitive foregut - left border of stomach
greater curvature
dorsal mesentery attached to the greater curvature of the stomach and the transverse colon
greater omentum
ventral mesentery attaches the stomach and proximal duodenum to the liver and is divided into hepatogastric and hepatoduodenal ligaments
lesser omentum
what is found within the portal triad within the hepatoduodenal ligament
- portal vein
- hepatic artery
- bile duct
folds seen inside the stomach
gastric rugae
what are the 5 arteries that supply the stomach
- left gastric
- right gastric
- right gastro-omental
- left gastro-omental
- short gastric
arises from celiac trunk and runs in the lesser omentum to the cardia, turns back to run along the lesser curvature of the stomach and anastomose with the R gastric a.
left gastric a (may give off esophageal branches)
arises from the proper hepatic artery and runs along the lesser curvature
right gastric a
arises from the gastroduodenal artery and runs along the greater curvature to anastomose with the left gastro-omental artery within the greater omentum
right gastro-omental a
arises from the splenic artery and runs along the greater curvature
left gastro-omental a
arise from splenic artey and vascularizes the fundus of the stomach
short gastric a
para and sym innervation of the stomach
para - vagal trunks
sym -
T6-T9 levels of the stomach (pregang fibers from greater splanchnic)
T5-T9 (postgang from celiac ganglion)
20 feet in length
small intestine
(1 foot) C shaped and receives bile from gall bladder, and enzymes from the pancreas
duodenum
(8 foot) majority of chemical digestion occurs here. mucosa has circular folds of Kerckring gibing it a rough appearance. found MOSTLY in LUQ
jejunum (long vasa recta)
longest part, contents empty into cecum after passing the ileocecal valve. found MOSTLY in RLQ
ileum (short vasa recta)
short vasa recta with 2-3 layer of arterial arcades
ileum
long vasa recta and one layer of arterial arcades
jejunum
para and sym of small intestine
para - posterior vagal trunk
sym - postgang superior mesenteric ganglia
part of duodenum that sits @ L1 and has hepatoduodenal ligament (ventral mesentary)
superior part of duodenum
part of duodenum that sits @L1-L3 and has hepatopancreatic ampulla of vater
descending part of duodenum
the union of the bile duct and the major pancreatic duct
hepatopancreatic ampulla of Vater (not tag in lab)
prominence on the inside of the duodenum
major duodenal papilla (tag in lab)
this part of the duodenum is crossed by the superior mesenteric artery and vein
horizontal part
part of duodenum that ascends to the L2 vert. and is short
ascending part
allows for the facilitation of movement of intestinal contents and is supported by the suspensory muscle (ligament of Trietz)
duodenojejunal flexure
the horizontal and ascending parts of the duodeum are mainly vascularized by the
superior mesenteric artery
what two arteries supply the proximal part down to the bile duct of the duodenum
gastroduodenal a and superior pancreaticoduodenal a
the inferior pancreaticoduodenal artery is from the
superior mesenteric artery
para and sym innervation of the duodenum
para - vagus nerve
sym - celiac ganglia and superior mesenteric ganglia