TOPIC 8C. The stomach of ruminants, blood supply and innervation

Question 1

name the 4 parts of ruminant stomach

Answer 1

rumen reticulum omasum and abomasum

Question 2

which part is considered the true stomaach

Answer 2

abomasum

Question 3

which is the largest chamber

Answer 3

rumen

Question 4

what divides the ruminal sacs

Answer 4

pilae ruminis

Question 5

name the sacs of the rumen

Answer 5

saccus dorsalis., ventralis, cranialis, caudodorsalis, caudoventralis

Question 6

which sac is known as atrium ruminis

Answer 6

saccus cranialis

Question 7

what does saccis ventralis have

Answer 7

rec. ruminalis extending from it cranially

Question 8

what do both saccus caudodorsalis and caudoventralis have

Answer 8

sulcus coronarius dors/vent

Question 9

list the grooves of the rumen

Answer 9

sulcus longitudinales dors and vent
sulcus accessorius
sulcus cran and caud
sulcus ruminoreticularis

Question 10

what do sulcus longitudinale and accessorius DEXTRA produce

Answer 10

insula ruminis

Question 11

what do ruminal papillae do

Answer 11

increase surface area x7

absorb water, vit k and b

Question 12

what separates the reticulum from the rumen

Answer 12

plica ruminoreticulares

Question 13

is reticulum in contact with diaphragm

Answer 13

yes

Question 14

whats distinct about reticulum

Answer 14

honeycomb pattern

Question 15

what creates this honeycomb pattern of reticulum

Answer 15

cristae reticuli and cellulae reticuli

Question 16

major role of reticulum

Answer 16

regurgitation of food

Question 17

whats the smallest compartment of the ruminant stomach

Answer 17

omasum

Question 18

where is the omasum

Answer 18

between right abdominal wall and rumen

Question 19

what connects the reticulum to the omasum

Answer 19

ostium reticulomasum

Question 20

what connect the omasum to the abomasum

Answer 20

ostium omasum-abomasum

Question 21

what connetc the two openings of the omasum

Answer 21

sulci omasi

Question 22

what does the interior of the omasum have

Answer 22

lamina omasi

Question 23

whats the omasum’s role

Answer 23

reabsorption of water

Question 24

what enters the absomasum

Answer 24

dry matter

Question 25

what can happen in dairy cows 3-4 weeks after calving

Answer 25

abomasum displacement

Question 26

wheres the abomasum located

Answer 26

distally, ventral and on right side

Question 27

what increases the surface area of the abomasum

Answer 27

plicae spirales

Question 28

what does the abomasum have

Answer 28

fundus, pyloris and corpus

gastric and pyloric glands

Question 29

whats sulcus ventriculi

Answer 29

gastric groove consisting of reticulum, omasum and abomasum grooves

Question 30

where does sulcus ventriculi begin - and what does it allow

Answer 30

oesophagus - allows milk straight into abomasum in newborn

Question 31

what supplies the ruminant stomach

Answer 31

a coeliacas and branches
a ruminalis sin and dex
a reticularis from a ruminalis sin

Question 32

what supplies the omasum and abomasum

Answer 32

gastroepiploics

Question 33

what nerves innervate the ruminant stomach

Answer 33

sympathetic: coeliac plexus
gastric plexus and ruminal plexus L&R
also to liver and spleen

parasympathetic: vagus
dorsal trunk: rumen, reticulum, omasum and abomasum
ventral trunk: atrium ruminis, pylorus, gastric groove, liver and duodenum

Question 34

what veins for the ruminant stomach

Answer 34

portal vein,
v ruminalis,
v ruminalis dextra and
v lienalis