Flashcards in Lab 5: Abdomen Deck (33)
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name the opening the esophagus passes through in the diaphragm
esophageal hiatus
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3 tubular structures entering the ventro-medial (visceral) surface of the liver. Which will have the widest lumen?
hepatic artery, portal vein, bile duct. Portal vein has widest lumen
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Does horse have a gall bladder?
NO
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Which organs/structures leave impressions on the liver? (6)
stomach, esophagus, descending duodenum, R kidney, caudal vena cava, R dorsal ascending colon
4
Compare the epithelium of the blind sac of the stomach vs. the distal stomach
blind sac: whitish, non-glandular, stratified squamous epithelium
distal stomach: pink, glandular
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Border between blind sac and distal stomach
margo plicatus
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what prevents the horse from vomiting?
the thick cardiac sphincter. Horse can only vomit in severe cases
7
What drains into the major duodenal papilla in the horse?
Bile duct and pancreatic duct
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What drains into the minor duodenal papilla in the horse?
Accessory pancreatic duct
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What part of colon passes cranial to the root of the mesentery?
transverse colon
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From what side does ileum enter the cecum?
from the medial side
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What direction does the cecocolic orifice face?
caudally into the R ventral colon
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Why is it important to know pattern of bands and sacculations in the horse?
For identification in abdominal surgery and rectal palpation
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Which segment(s) of the colon have distinct sacculations?
R ventral colon, L ventral colon, small colon
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Which segment(s) of the colon have no sacculations?
L dorsal colon
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Which segment(s) of the colon have indistinct sacculations?
R dorsal colon
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How many free and hidden bands does the R ventral colon have?
2 free, 2 hidden (same as the L ventral colon)
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How many free and hidden bands does the R dorsal colon have?
2 free, 1 hidden
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How many free and hidden bands does the L dorsal colon have?
0 free, 1 hidden
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How many free and hidden bands does the L ventral colon have?
2 free, 2 hidden. (same as R ventral colon)
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How many free and hidden bands does the small colon have?
1 free, 1 hidden
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Does the cecum have bands and/or sacculations?
Yes-both
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What does the colic branch of the ileocolic artery supply?
ventral coli
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What does the R colic a. supply?
dorsal coli
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Where doe the colic br. of ileocolic a. and R colic a. anastomose?
pelvic flexure
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Why are colic conditions exacerbated by ischemia at the pelvic flexure?
This is the location where the R colic a. and colic br. of the ileocolic a. anastomose and end, so it is more susceptible to ischemia
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What is the peritoneal cavity lined by?
parietal peritoneum
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What muscle lies directly ventral to the parietal peritoneum, fascia, and fat?
Rectus abdominis
28
How many lumbar vertebrae are normally in the horse? What about Arabians?
6 normally, Arabians usually have 5
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How many bones fuse to form sacrum in horse?
5 sacral vertebrae
31
Avg. number of caudal (coccygeal) vertebrae in horse
18
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whats another term for sacculations?
haustra
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