🐄 Comparative Anatomy - Digestive System

Horses and Pigs

Which animals does not have a philtrum?

Sensory corpuscles

What helps the beak of the birds to be seen as a sensory organ?

ridge

What is replaced by the median raphé of the dog?

Sheep

Which animal has non-serrated palatine rugae?

Torus linguae

What can be seen in the bulge of the posterior half of dorsum in cattle?

Entoglossal bone

What bone or structure is found in the tongues of the avians?

Ruminants

What animal has the least teeth in its temporary dentition?

does have

Horses — have or does not have — a canine tooth in its permanent dentition.

upper 1st premolar (usually absent)

Where can wolf tooth be found in horses?

needle teeth

What do you call the deciduos 3rd incisor of the pigs?

Modified Triadan system

What is the method used for numbering teeth in animals?

Ruminants and dogs

Which animal/s have the most teeth in the permanent dentition?

Minor slivary glands

Which salivary glands has mucous secretion?

15 L

How many do pigs produce litters of saliva per day?

Oropharynx

This is also known as the digestive channel

Pharyngeal diverticulum

What is the blind pouch in the nasopharynx found in pigs?

lateral walls of the nasopharynx

Where can you find the pharyngeal openings of the auditory tubes?

Esophageal opening

This opens the caudal end of the laryngopharynx.

isthmus esophagi

What is the other name for esophagus in dogs?

Horses and cats

Which animals has the first 2/3 of the esophagus striated?

angular notch

What is the distinct special feature of a cat’ stomach?

Proventriculus

What is the glandular stomach of a chicken?

Abomasum

What stomach compartment is biggest during birth in ruminants?

Proventriculi

What is the collective term of all the four compartments of the stomach?

Pillars

What can be found beside or near to the reticular grooves?

Left and right longitudinal grooves

This divides the rumen into dorsal and ventral sacs.

separates the cranial sac of the rumen from the reticulum

What does the rumenoreticular groove do?

vasopressin or antidiuretic hormone

What stimulates the liquid passage in the reticular groove?

ventral part of the right of the abdominal cavity

Where can you find the jejunum of the pigs?

Horses

Which animals has its jejunum in the left dorsal part of the abdominal cavity?

Flange

What part in the intestines of the ruminants where the longest mesentery can be found?

dilated cranial part of the horse’s abdomen

Where can the duodenal ampulla of a horse can be found?

does not have

Sheeps — does have or does not have — taenia.

does have

Horses — does have or does not have — four longitudinal bands.

Colon is ABSENT

Where can you find the colon of the birds?

rectum

What comes after the descending colon?

Right dorsal colon

What is the part of a horse’s colon that is referred to as ampulla coli?

Dog

Which animal has a non-sacculated ascending colon?

internal and external anal sphincter

What controls the anal canal?

Columnar zone, Intermediate zone, and Cutaneous zone

What are the three division of the anal canal in pigs?

Birds

Which animal does not have an ampulla recti?

Flask-shaped dilation

What is the appearance of the ampulla recti of the goats?

unpaired bursa of Fabricius

What opens the proctodeum?

Urodeum

What part of the bird’s cloaca holds the openings of the ureters?

Left lateral lobe

Which of the lobes of the liver considered biggest in dogs?

Pigs

Which animal does not have a renal impression?

Bile canaliculi

Where does the bile discharge out of?

Duodedum

Where does the common bile duct of the liver connect to?

Dog

Which animal does not have a left, right, or common hepatic ducts?

left and right hepatic duct

What does the lobar duct of the liver consist of?

small elevation within the duodenum or the major duodenal papilla

Where does the pancreatic duct open to?

Duct of Santorini

Other name for accessory pancreatic duct

Triangular in shape

What is the morphology of the pancreas of horses?

does have

Cattle — does have or does not have — an accessory pancreatic duct.

pelvic flexure

what separates the left ventral and left dorsal colons?

right ventral and left ventral colons

what does the sternal flexure separate?