GI Organ Anatomy Flashcards
what is magenstrasse
“stomach street” quick path for liquid and pills, site for ulcer formation
caustic substances leave dark streaks
brunners gland location/ fn
duodenum, secrete alkaline fluid and human epidermal growth factor
picae circulares location/ fn
jejunum, spiral folds for increasing surface area
peyers patches location/ fn
lymphoid nodules into submucosa, mainly in ileum
2 structures in the second/descending part of the duodenum
major papilla: opening of common bile duct and pancreatic duct
minor papilla: opening of accessory pacreatic duct
important structures near 3rd part of duodenum
crosses over aorta and under SMA (nutcracker, along w/ renal vein), around L3 and beginning of midgut
termination and junction of 4th/ascedning part of duodenum
terminates at duodenojejunal junction, held in place by suspensory ligament (ligament of treitz)
2 upper corners of colon
right colic flexure (hepatic)
left colic flexure (splenic)
describe appendix
contains large amounts of lymphoid tissue, suspended by mesoappendix
what happens 2/3 across transverse colon
switches from midgut to hindgut
innervation becomes S2-S4 instead of vagus, blood supply from SMA to IMA
peritoneal status of colon
ascending- secondarily retro
Transverse- intra
desceding- secondarily retro
sigmoid- intra
ampulla
lower dilated part of rectum where feces are stored
anal canal 2 zones
above pectinate line: mucous membrane, simple columnar/cuboidal, visceral sensory, venous drainage to portal, lymphatic to internal iliac
below pectinate (pretty much opposite): skin, stratified squamous, general sensory, venous to caval, lymphatic to superficial inguinal
2 diff anal sphincter
inner: smooth muscle muscularis externa
outer: skeletal muscle, subcutaneous, superficial and deep
5 ligaments of liver
falciform- anterior to ab wall
triangular- attach to diaphragm
coronary- to diaphragm
hepatogastric- attaches to stomach
hepatoduodenal
