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SP1 Anatomy II > Lecture 20 4/3/24 > Flashcards

Lecture 20 4/3/24 Flashcards

1
Q

What are the four compartments of the bovine stomach, and how are they oriented?

A

-reticulum: cranial
-rumen: left
-omasum: right
-abomasum: right and ventral

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2
Q

What are the characteristics of the reticulum?

A

-located between diaphragm and rumen
-on midline in 6-9th intercostal spaces
-dorsally continuous with cranial sac of rumen

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3
Q

Which structure ventrally separates the reticulum from the cranial sac of the rumen?

A

rumenoreticular groove

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4
Q

What are the characteristics of the rumen?

A

-large and laterally flattened
-extends from diaphragm to pelvic inlet
-fills left half of abdominal cavity
-caudoventral part can extend to right of midline

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5
Q

What is the left side of the rumen associated with?

A

-left abdominal wall
-floor of abdominal cavity
-diaphragm

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6
Q

What is the right side of the rumen associated with?

A

-intestines
-liver
-omasum
-abomasum

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7
Q

What is the dorsal curvature of the rumen associated with?

A

-diaphragm
-roof of abdominal cavity

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8
Q

What is the ventral curvature of the rumen associated with?

A

floor of abdominal cavity

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9
Q

Which grooves divide the rumen?

A

-left and right longitudinal grooves
-cranial and caudal grooves
-dorsal and ventral coronary grooves

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10
Q

What do the cranial and caudal grooves divide the rumen into?

A

dorsal and ventral sacs

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11
Q

What do the dorsal and ventral coronary grooves form?

A

caudodorsal and caudoventral blind sacs

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12
Q

What are the characteristics of the cranial sac?

A

-projects cranially from dorsal sac
-known as ruminal atrium

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13
Q

What are the characteristics of the ruminal recess?

A

projects cranially from the ventral sac

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14
Q

What is housed within the ruminal grooves?

A

-vessels
-nerves
-lymphatics
-lymph nodes

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15
Q

What are the characteristics of the omasum?

A

-spherical
-lies ventrally between ventral sac of rumen and right abdominal wall
-contacts right abdominal wall in intercostal spaces 6-11
-larger than reticulum in bovine; smaller in sheep and goat

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16
Q

What are the characteristics of the abomasum?

A

-resembles simple stomach of the canine
-divided into cardiac, fundic, body, and pyloric parts
-greater and lesser curvatures

17
Q

What are the branches of the celiac a.?

A

-splenic a.
-left gastric a.
-hepatic a.

18
Q

Which arteries branch off of the splenic a.?

A

-right ruminal a.
-left ruminal a.
-reticular a.

19
Q

What are the characteristics of the inside of the reticulum?

A

-aglandular
-crests that form cells in a honeycomb structure
-small papillae
-lined with cornified, stratified squamous epithleium

20
Q

How does the reticulum communicate with the cranial sac of the rumen?

A

rumenoreticular orifice

21
Q

Which structure separates the reticulum from the cranial sac of the rumen?

A

rumenoreticular fold

22
Q

What are the characteristics of the inside of the rumen?

A

-aglandular
-tongue-shaped papillae
-lined with cornified, stratified squamous epithelium
-dorsal and ventral sacs separated by pillars

23
Q

Which pillars are present within the rumen?

A

-right and left longitudinal pillars
-cranial and caudal pillars
-dorsal and ventral coronary pillars

24
Q

How does the dorsal sac of the rumen communicate with the ventral sac?

A

intraruminal opening

25
Q

What are the characteristics of the inside of the omasum?

A

-aglandular
-lined with cornified, stratified squamous epithelium
-filled with lamina; increased SA for water absorption

26
Q

Which region of the omasum lacks lamina?

A

omasal canal

27
Q

How does the omasum communicate with the abomasum?

A

omasal-abomasal orifice

28
Q

What are the characteristics of the inside of the abomasum?

A

-glandular
-mucosa has permanent spiral folds
-ruminants and pigs lack a good pyloric sphincter

29
Q

Which region of the abomasum lacks permanent spiral folds?

A

abomasal groove

30
Q

What do ruminants and pigs have in place of a pyloric sphincter?

A

torus pyloricus

31
Q

What is the gastric groove?

A

channel from the reticulum to the pylorus

32
Q

What are the divisions of the gastric groove?

A

-reticular groove
-omasal groove
-abomasal groove

33
Q

What is the function of the gastric groove?

A

shunt milk from esophagus to abomasum

SP1 Anatomy II (23 decks)

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