GI Week 2 Workbook + quiz Flashcards
3 constrictions of oesophagus
cervical
thoracic
diaphragmatic
What structures pass through the diaphragm at the oesophageal
opening? x5
- Oesophagus
- Oesophageal branches of left gastric artery and vein
- Left and right vagus nerves
- Lymphatics
- Phreno oesophageal ligament
blood supply to abdominal oesophagus x2
oesophageal branches of left gastric artery from celiac artery
branches of left inferior phrenic artery
venous drainage to abdominal oesophagus x2
-drains into plexuses to the left gastric vein and abdominal azygous
lymph drainage of abdominal oesophagus
celiac nodes
what forma pyloric sphincter
thickening of circular smooth muscle in muscularis externa
What layers are the gastric folds/rugae formed from?
mucosa and submucosa layers
What are the 4 main veins draining the stomach?
- Left gastric- hepatic portal vein.
- Right gastric- hepatic portal vein.
- Left gastro-omental- splenic vein then to the hepatic portal
vein. - Right gastro-omental- superior mesenteric vein then to the
hepatic portal vein.
where dp nodes of stomach drain to
celiac nodes
nerve supply to stomach
parasympathetic- vagus
sympathetic- celiac plexus (T6-T9) via the greater splanchnic nerves
what else does vagus do in stomach
carry sensations of pain, fullness, and nausea
How many parts does the duodenum have?
4
What organ sits within the C shape of the duodenum?
pancreas
name for opening in the duodenum where pancreatic and bile fluids enter the
gut tube
what controls it
major papilla of vater
sphincter of oddi
what 2 structures come together at major papilla of vater
pancreatic duct
common bile duct
jejunum vs ileum
thickness
colour
fat
lymph
vasa recta length
jejunum:
thicker
red
less
less
long
ileum:
thinner
pink
more
more- payers patches
short
in general jejunum is bigger and thicker but has t exceptions seen above
Which major blood vessel supplies the jejunum and ileum?
Superior mesenteric
Where do the veins surrounding the jejunum and ileum drain to?
Superior mesenteric
Which set of lymph nodes does lymph drain to from here?
Superior mesenteric to pre aortic
3 features of large intestine
tenia coli- bands of longitudinal smooth muscle on the colon
omental appendages- fatty pouches
haustra- bulges
What two structures open into the caecum?
ileum
appendix
What is McBurney’s point
Site of max tenderness during acute apendicitis
arterial supply of ascending colon x2
Ileocolic
right colic arteries
venous supply of ascending colon x2
iliocolic
right colic veins
arterial supply of transverse colon x3
right, left and middle colic
venous supply of transverse colon x2
superior mesenteric
middle colic
arterial supply of descending colon x2
left colic
sigmoid arteries
venous drainage of descending colon x1
inferior mesenteric
arterial supply of sigmoid colon x1
sigmoid artery
venous supply of sigmoid colon
inferior mesenteric
blood and lymph supply of rectum: superior 1/3
and peritonisation
rectal artery
rectal vein
pararectal lymph
node
intra
blood and lymph supply of rectum: middle 1/3
and peritonisation
middle rectal artery
systemic internal ileac vein
internal iliac lymph
retro
blood and lymph supply of rectum: inferior 1/3
and peritonisation
inferior rectal artery
systemic internal iliac vein
internal iliac nodes
extra
What is the role of the pelvic floor in maintaining faecal continence?
Muscles allow controlled emptying
What other structures are involved in faecal continence? x3
internal anal sphincter
external anal sphincter
rectal ampulla
What is the pectinate line?
the junction between endoderm and ectoderm
- cone shaped limit of anal values
Name the four lobes of the liver:
- Left
- right
- quadrate
- caudate
Which lobes of the liver cannot be seen from the front?
caudate and quadrate
The liver is encapsulated with a…..
fibrous layer
known as a capsule.
The fibrous layer is innervated by…
lower intercostal nerves
What is meant by the term ‘bare area’ of the liver?
No peritoneal- direct contact with diaphragm