Abdominal Viscera Flashcards
which parasympathetic nerve innervates the anterior vagal trunk of the esophagus
- left vagus
which parasympathetic nerve innervates the posterior vagal trunk of the esophagus
- right vagus
esophageal arteries arise from
- aorta
- bronchial arteries
- left gastric artery
esophagus drained by small vessels returning primarily t the _________
- azygous system
upper 1/3 of esophagus is _______ muscle
middle 1/3 of esophagus is _______ muscle
lower 1/3 of esophagus is ________ muscle
- skeletal
- mix of skeletal and smooth
- smooth muscle
function of esophagus
- conveys bolus of food by perastalsis to stomach
parts of the upper esophageal sphincter
- pharyngoesophageal sphincter
- cricopharyngeus part of inferior pharyngeal constrictor
parts of lower esophageal sphincter
- gastroesophageal or cardiac sphincter
what is the point of attachment for the gastroepiploic ligament and greater omentum
- greater curvature of the stomach
what is the point of attachment for the lesser omentum
- lesser curvature of the stomach
the pyloric orifice is an outlet surrounded by the
- pyloric sphincter
muscle of the stomach
- 3 layers of smooth muscles
what are rugae
- wrinkles in inner stomach lining
function of stomach
- acidifies and converts bolus of food into chyme
- produces digestive enzymes and hormones
what is the thickening of the middle circular layer of the muscularis externa in the stomach
- pyloric sphincter
what is a quick pathway from liquids and pills and a site of peptic ulcer formation
- magenstrasse
dark streaks are found in the ___________ after caustic substance ingestion
- magenstrasse
what runs from the pyloric orifice in the stomach to the ileocecal junction
- small intestine
function of small intestine
- secretes hormones
- continues digestion
- absorbs resulting metabolites
what part of the small intestine is located in the LUQ
- jejunum
what part of the small intestine is located in the RLQ
- ileum
what secretes alkaline fluid and urogastrone
where are they located
- Brunner’s glands
- small intestine
what enhances epithelial cell division and inhibits gastric HCL production
- urogastrone
what are spiral circular folds that increase the surface area two fold
where are they located
- plicae circulares
- small intestine
what are large lymphoid nodules that extend into submucosa
where are they located
- Peyer’s patches
- small intestine
intestinal villi increase surface area _____ fold
- 10
microvilli contain
- actin
microvilli increase surface area ______ fold
- 20
part of the microvilli that forms barriers due to tight junctions
- zonula occludens
which part of the duodenum has a mobile part known as the duodenal cap
- 1st (superior
where do most duodenal ulcers occur
- superior part of duodenum
1st (superior) part of duodenum corresponds to what vertebral level
- L1
which part of the duodenum contains the major and minor papilla
- 2nd (descending)
what is the opening of the common bile duct and main pancreatic duct
- major papilla
where is the major papilla located
- junction of foregut and midgut
what is the opening of the accessory pancreatic duct
- minor papilla
2nd (descending) part of duodenum corresponds to what vertebral level
- L2-L3
main pancreatic duct and common bile duct converge at the ___________-
- major duodenal papilla
what part of the duodenum crosses the aorta under the SMA and has the SMA run over it
- 3rd (inferior or transverse) part
what part of the duodenum is the beginning of the midgut
- 3rd
the 3rd (inferior or transverse) part of duodenum corresponds to what vertebral level
- L3
what part of the duodenum terminates at the duodenal junction
- 4th (ascending)
what holds the duodenojejunal junction in place
known as the suspensory muscle of duodenum
composed of smooth or skeletal muscle
- ligament of Treitz
- skeletal muscle
the 4th (ascending) part of duodenum corresponds to what vertebral level
- L2
the nutcracker describes the relationship between
- duodenum and SMA
jejunum is vascularized by _____ vasa recta
- long vasa recta
ileum is vascularized by ________ vasa recta but _______ arterial arcades than the jejunum
- short vasa recta
- more arterial arcades than the jejunum
what is the thickening of the inner circular layers of the muscularis external in the ileum
- ileocecal sphincter
function of colon
- absorb fluid and electrolytes
- produce feces and mucus
- house bacteria that produce vitamins B12 and K
what is the first part of the colon called
- cecum
what the hollow tube connected to the cecum that contains large aggregates of lymphoid tissue
- appendix
appendix suspended by the
- mesoappendix
traverse colon suspended by the
- transverse mesocolon
what occurs 2/3 distance across transverse colon
- division of midgut and hindgut
in the division of the midgut and hindgut parasympathetic innervation switches from
- vagus to S2-S4
blood supply in the division from the midgut to hindgut switches from
- SMA to IMA
sigmoid colon suspended by
- sigmoid mesocolon
what extends from the sigmoid colon to the anal canal
- rectum
what is the lower part of the rectum where feces are stored
- ampulla
superior part of the rectum vascularized by the ______ system
- portal system
middle and inferior part of the rectum vascularized by the _____ system
- caval
what lies below the pelvic diaphgram and ends at the anus
- anal canal
what are spaces in between anal columns called
- anal sinuses
membrane or skin above the pectinate line in the anal canal
what about below
- mucous membrane above
- skin below
epithelium above the pectinate line in the anal canal
what about below
- simple columnar/cuboidal above
- stratified squamous below
sensory innervation above the pectinate line in the anal canal
what about below
- visceral above (less sensitive)
- general below (very sensitive)
venous drainage to ________ above the pectinate line in the anal canal
what about below
- portal above
- systemic below
lymphatic drainage to _______ nodes above the pectinate line in the anal canal
what about below
- to internal iliac nodes above
- to superficial inguinal nodes below
the internal anal sphincter is smooth or skeletal muscle
what about external
- smooth
- skeletal
what is the largest visceral organ in the body
where is it located
- liver
- right hypochondriac and epigastric regions
what attaches the liver to the abdominal wall
- falciform ligament
what attaches the liver to the diaphragm
- triangular and coronary ligament
what attaches the liver to the stomach and is part of the lesser omentum
- hepatogastric ligament
what attaches the liver to the duodenum and is part of the lesser omentum
- hepatoduodenal ligament
what is the point of entry for hepatic arteries and the portal vein and the exit point for hepatic ducts
- porta hepatis
left lobe of the liver includes which lobes
- quadrate lobe
- caudate lobe
liver blood flow
- portal vein
- branches of portal vein
- sinusoids
- central vein
- sublobular vein
- hepatic vein
which parts of the portal triad enter the liver
which parts leave
- proper hepatic artery and hepatic portal vein
- common hepatic duct
where does the common hepatic duct drain
- cystic duct into the gallbladder
- common bile duct
once bile has been released from the gallbladder, what is its path
- cystic duct
- common hepatic duct
- common bile duct
- duodenum
function of gallbladder
- receives, concentrates, and stores bile from liver
blood supply of pancrease
- anterior/posterior superior pancreaticduodenal arteries (from celiac)
- dorsal pancreatic branches of splenic artery (from celiac)
- anterior/posterior inferior pancreaticduodenal arteries (from SMA)
parasympathetic nervous system is (craniosacral/thoracolumbar) in origin?
what about sympathetic
- craniosacral
- thoracolumber
pre/post cell length in parasympathetic
what about sympathetic
- long:short
- short:long
synapse location of parasympathetic
what about sympathetic
- wall of organ
- ganglia
postsynaptic neurotransmitter of parasympathetic
what about sympathetic
- acetylcholine
- NE
parasympathetic action on anal sphincter
sympathetic action on anal sphincter
- inhibit anal sphincter
- contract anal sphincter
innervation of foregut at what vertebral levels
by what nerves
- T5-T9
- greater thoracic splanchnic and vagus
innervation of midgut and kidney at what vertebral levels
by what nerves
- T10-T11
- lesser thoracic splanchnic and vagus
innervation of hindgut at what vertebral levels
by what nerves
- L1-L2 (lumbar splanchnic)
- S2-S4 (pelvic splanchnic)
what ends at the second part of the duodenum
- foregut
what ends near the junction of the transverse colon
- midgut