TOPIC 4.1 - COMPARATIVE DIGESTIVE SYSTEM Flashcards
This animal’s esophagus is voluntary as far as the base of the heart.
Horse
This animal’s esophagus is easily dilatable and voluntary throughout.
Ox/Sheep
This animal’s esophagus is voluntary until the last few inches near the cardia.
Pig
This animal’s esophagus is voluntary throughout and it is constricted ventrally at the origin by thick layer of mucous glands.
Dog
In dogs, their esophagus has ventral constriction called?
Isthmus esophagi
In horses, the average capacity of their stomach is?
3 gallons
In horse, the non-glandular is separated from glandular region by an irregular ridge called?
Margo plicatus
In horse, the non-glandular left extremity in the horse is called?
Saccus caecus
In pigs, the average capacity of their stomach is?
2 gallons
In pig, the left extremity of the stomach has a blind pouch called?
Diverticulum ventriculi
In pig, a prominence of fat and fibrous tissue projects into the pylorus from the wall of the lesser curvature called?
Torus pyloricus
This animal’s stomach is pear-shaped and distensible
Dog
In dogs, the average capacity of their stomach is?
4 pints
This stomach is compound compared to the stomach of other domestic animals
Ruminant Stomach
What are the four compartments or the ruminant stomach?
- Rumen
- Reticulum
- Omasum
- Abomasum
True or False. In young calves/cattles, the omasum secretes rennin that curdles milk. Once mixed with milk, it solidifies.
False. Abomasum
This compartment in the ruminant is where the gastric glands are present.
Abomasum
The rumen, reticulum, and omasum are in fact dilation in the walls of the ____ ____.
Abdominal esophagus
Rumen, reticulum, and omasum are collectively termed as ?
Ventriculi
The mucous membrane of the interior of rumen, reticulum, and omasum is covered with what epithelium? (this type of epithelium makes them non-glandular)
Stratified squamous epithelium
The esophagus of ruminants enters the stomach at an area known as the ?
Atrium ventriculi
The atrium ventriculi of ruminants is situated at the vertebral extremities of ___ and ___ ribs, slightly to the left of the mid-line.
8th and 9th
Rumen occupies most of the ___ half of the abdominal cavity from the ___ intercostals space to the ___ inlet.
left, 7th, pelvic
The mucous membrane of rumen vary in form. What are the variations?
- Foliate
- Filiform
- Club-shaped
The most anterior and smallest of the non-glandular stomach of ruminants.
Reticulum
The greater part of reticulum lies on the ___ side of the median plane opposite to ribs ___, ___, and ___.
left, 6,7,8
The mucous membrane of the interior of reticulum is thrown into ridges, hence, forming what appearance?
Honeycomb appearance
Omasum of ruminants lies chiefly on the ___ side of the mid-line from the ___ to ___ ribs.
right, 7th, 11th
This compartment of ruminant is an elongated sac which lies chiefly on the abdominal floor.
Abomasum
The anterior end or fundus of abomasum is in the ___ region.
xiphoid (caudal portion of sternum)
The reticulum functions as a fermentation trap for the digestion of herbivorous foods. True or False?
False, rumen.
In order for liquids such as milk to be carried to the omasum and hence to the glandular stomach without having to go through the rumen, or other proventriculi, this form a channel which is continues with esophagus.
Two muscular lips/Esophageal groove
The esophageal groove begins at what part of the ruminant’s stomach.
Cardia
The esophageal groove of ruminants passes ventrally on the medial wall of the ___ and ___.
Atrium and reticulum
The esophageal groove of ruminants ends at the ?
Reticulo-omasal orifice
In calves, omasal groove is present. True or False?
True
The esophageal groove has a spiral course of what patterm?
B - backwards
O - outwards
D - downwards
F - forwards
I - inwards
What is the length of small intestine in horse?
70 feet
In horse, about 6 inches from the pylorus, the duodenum has a pouch called?
Diverticulum duodeni
The ___ ___ and ___ ___ open in the diverticulum duodeni of horse.
Ventral pancreatic, hepatic ducts
In horse, the dorsal or accessory pancreatic duct opens on small papilla opposite the diverticulum. True or False?
True
What is the length of ox’s small intestine?
130 feet
In ox, duodenum commences with a ?
Sigmoid flexure
There is a presence of ventral pancreatic duct in ox. True or False?
False
In ox, the bile duct opens in the dorsal part of the small intestine. True or False?
False, ventral part
What is the length of small intestine of sheep and goat?
80 feet
In sheep/goat, the bile duct is joined by the ventral pancreatic duct and dorsal pancreatic duct to form a common bile duct. True or False?
False, they have no dorsal/accessory pancreatic duct.
In sheep/goat, there is no accessory pancreatic duct. True or False?
True
In sheep/goat, the common bile duct opens into the duodenum about ___ from the pylorus.
1 foot
What is the length of small intestine of pig?
60 feet
In pig, bile duct opens how many inches from pylorus?
2 inches
How many pancreatic duct are there in pigs?
Just 1
In pigs, a single pancreatic duct opens how many inches beyond the pylorus?
5 inches
What is the length of small intestine of pig?
13 feet
In dogs, bile duct and pancreatic duct open how many inches beyond pylorus?
2 inches
In dogs, the dorsal pancreatic duct opens 2 inches further back. True or False?
True
In horse’s large intestine, this segment is a blind and comma-shaped sac.
Caecum
What is the length of caecum in horse?
4 feet
Caecum in horse has how many taenia and haustra?
4 each
What is the length of colon in horse?
10 feet
Give the 4 parts of large colon of horse and their specific location.
- Right ventral colon - ventral diaphragmatic flexure
- Left ventral colon - pelvic flexure
- Left dorsal colon - dorsal diaphragmatic flexure
- Right dorsal colon - transverse colon
Large colon in horse commences at the base of the ___ and terminates under the ___ kidney by becoming small colon.
caecum, left
Small colon in horse commence at the termination of the ___ ___ behind the ___ ___ of the stomach and is continued at the ___ ___ as rectum.
large colon, saccus caecus, pelvic inlet
Small colon in horse is approximately how many feet in length and how many inches in diameter?
12 feet, 4 inches
Small colon in horse has how many taenia and hausta?
2 each
In horse, at the rectum’s termination, it has a flask-shaped dilation called?
Ampulla recti
In ox and sheep, there are 2 taenias and haustras. True or False?
False, no presence of taenia and haustra.
What are the two parts of colon in ox/sheep? Give their other term too.
- Ansa spiralis
- Ansa distalis
Spiral portion of the colon of ox/sheep is arranged against the ___ flank in double elliptical coils between the ___.
right, mesentery
The elliptical coils of the colon of ox/sheep are alternatively ____ and ____.
Centripetal and centrifugal
Centripetal means?
Into the interior or toward the center
Centrifugal means?
To the exterior or away from the center
Same as horse, ox and sheep has ampulla in the rectum. True or False?
False, no ampulla.
The caecum of ox and sheep is in what shape ?
Cylindrical
Caecum in horse and sheep is situated at the ___ side.
Left
How many taenias in colon are there in ox/sheep?
3
In this animal, the caecum has a spiral twist and is small and finger-like.
Ox/sheep
This animal’s liver has no gallbladder.
Horse
This animal’s liver is not divided into lobes.
Ox
This animal’s liver has caudate process visible from parietal surface.
Ox
In sheep’s liver, its caudate process is visible from parietal surface. True or False?
False
This animal’s liver’s parenchyma has a morocco leather appearance.
Pig
Pig’s liver is well-divided into 4 main lobes. True or False?
True
In this animal’s liver, caudal vena cava is embedded in the parenchyma.
Pig
In pigs, gallbladder makes impression on liver. True or False?
False, gallbladder is sunk in a fossa
This animal’s spleen is triangular in shape has suspensory ligament.
Horse
This animal’s spleen is elongated with thin rounded extremities.
Ox
This animal’s spleen has short hilus and has no suspensory ligament.
Ox
This animal’s spleen is the same with ox but triangular in shape.
Sheep
This animal’s spleen is strap-like and has long hilus.
Pig
This animal’s spleen is in falciform-shaped, long, narrow, and has hilus that is in longitudinal ridge.
Dog
This animal’s pancreas has dorsal and ventral ducts.
Horse
In horse’s pancreas, ventral duct and dorsal duct are the same size. True or False?
False, ventral duct is larger
This animal’s pancreas in quadrilateral in shape and has only dorsal duct which enters the duodenum one foot after the bile duct.
Ox
This animal’s pancreas has only ventral duct and unites with hepatic duct and enters duodenum as common bile duct.
Sheep
This animal’s pancreas is triradiate in shape and has a single duct.
Pig
This animal’s pancreas has right and left branches and has two ducts present.
Dog
Dog’s pancreas are comprised of right and left branches which meet at ___ angle behind ___.
acute, pylorus
This animal’s soft palate is long, precluding oral breathing and vomiting.
Horse
Horse’s tonsil is diffused being situated in ? (Hint: 3 answers)
- Sinus
- Root of tongue
- Soft palate
This animal’s soft palate is bean-shaped circumscribed tonsil in sinus.
Ox/sheep
This animal’s soft palate has small median prolongatic termed the uvula.
Pig
The three tonsils of soft palate of the pigs is situated in ?
- Pharynx
- Soft palate
- Sinus
This animal’s soft palate is fusiform-shaped.
Dog
This animal’s hard palate is divided into 2 equal portion by the central raphe.
Horse
This animal’s hard palate has rugae that extends only 2/3 of the length of palate.
Ox
In horse, the palatine ridges only extends 1/3 of the hard palate. True or False?
False, extends from start to caudal.
Last few rugae of the hard palate of this animal are serrated on their free borders.
Ox
This animal’s hard palate rugae is not serrated thus distinguishing it from ox.
Sheep
In sheep’s hard palate, the opening of nasopalatine ducts form a prominent ___ on either side of the ___ ___ ___.
V, central incisive papilla
This animal’s hard palate is long and narrow and equal in width throughout.
Pig
This animal’s hard palate has both rugae and media raphe well marked.
Pig
This animal’s hard palate has incisive papilla that is prominent anteriorly/
Pig
The median raphe of this animal’s hard palate is replaced by a ridge.
Dog
The hard palate of dog is widest at about the ___ cheek tooth.
4th
This animal’s hard palate is in triangular orientatio.
Dog