anatomy Flashcards
What are the 2 differetn plexus’ within the Enteric nervous system
myenteric plexus (Auerbach)
submucosal plexus (Meissners)
what does the myenteric plexus control
motiliy and sphincters
what does the submucosal plexus control
epithelia and blood flow
which of the two plexi is more proximal to the lumen
submucosla (meissners)
parasymo control of GI tract?
VAgus up until distal end of trasnverse colon
S2,3,4 to descending colon and rectum
name of pacemaker cells in GI system
interstitial cells of cajal
what are the fat soluble vitamins
ADEK
how is nitrogenous was excreted
in urea
where is urea formed
liver
what is respiratory epithelium histologially?
pseudostraified columnar epithelium
layers of digestive tract (int to ext)
- mucosa
- submucosa
- muscularis externa
- serosa or adventita
where are brunners glands found and what do they do
found in duodenum - secrete alkaline fluid containing mucin to diffus stomach acid
name of lympoid tissue found in ileum
peyers patches
what cells produce mucin
goblet cells
what cells in the intestine and absorptive cells
enterocytes
what are the layers of muscle on outside of large intestien called
teniae coli
what muscles are responsible for jaw closing
- temporalis
- masseter
- med pterygoid
what muscle is reponsible for opening the jaw
lat pterygoid
what nerve supplies muscles of the jaw
CN v3 - mandibular division
what is sensory supply to top and bottom of mouth respectively
top- CN V2
bottom - CN V3
what is sensory supply to tongue
CN V3
what nerve is responsible for tongue taste
CN VII
what nerve does the chorda tympani orginate from
CNVII
what does the chorda tympani connect to
lingual nerve (branch of CNV3)
what does chorda tympani contain
taste axons (anterior tongue)
parasymp axons (salivary glands)
what nerves supply each salivary gland
parotid - CNIX
submandibular - CN VII (via chorda t)
sublingual - CNVII (via chorda t)
retroperitoneal organs
2nd and 3rd part duodenum, ascending and descending colon, rectum, kidney ureter, pancreas, aorta
where does the lesser omentum attach to
lesser curvature of the stomach
what marks start and end of midgut
distal duodenum to prox 2/3rds of transverse colon
what level of spine to sympathetic nerve to abdominal organs travel form
T5 to L2
level of coeliac trunk
T12
what doe sthe coeliac trunk split into
trifurcates
1. splenic artery
2. hepatic artery
3. left gastric artery
blood supply of colon
sup and inf mesenteric art vis the marginal artery of drummond
what line seperates the rectum
pectinate/dentate line
what is the blood supply to the lower rectum
inferior and middle rectal vein - branch of internal iliac vein
blood supply above dentate line
superior rectal vein - IMV
where are the three veous anastomosis of portal and systemic systems found
- oesophagus
- rectum
- umbilicus
