Comparative Anatomy (Digestive System) Flashcards
What animal is their esophagus:
Striated throughout;
constricted ventrally at the origin by thick layer of the mucus glands known as the _____ ______
Dog;
isthmus esophagi
Striated throughout;
lumen of the esophagus narrows at the thoracic inlet and the esophageal hiatus of the diaphragm, which predisposes them to choke on those site
What animal?
Ruminant
Under Esophagus
Their esophagus is only striated throughout (as far as the base of the heart);
** the caudal third is** ______;
lumen of the esophagus narrows at the ______ ____ and the esophageal hiatus of the diaphragm; which predisposes them to choke on those area.
What animal?
Horse;
caudal third is smooth
lumen of the esophagus narrows at the thoracic inlet
striated until the last few inches near the cardia;
smooth muscle in the most caudal part
what animal and what digestive organ?
Pig; Esophagus
Only the first 2/3 is striated (as far as the base of the heart);
caudal third is smooth.
Not the horse. What other animal?
Cat
The esophagus of bird features a distensible dilation called _____ or _____.
crop / ingluvies
- Occupies the ventral part of the abdominal cavity between the stomach and urinary bladder.
- Covered by the greater omentum.
What animal and what digestive organ?
Dog; Jejunum of Small intestine
- Found on the right half of the abdominal cavity because the rumen occupies the left side.
- Position of the jejunal coils depends on the fullness of the rumen and the size of the uterus.
What animal?
Ruminants
Found on the ventral part of the right half of the abdominal cavity.
What animal and what organ?
Pig; Jejunum
Most of the jejunum is found within the left dorsal part of the abdomen.
What animal?
Horse
The jejunum and ileum (jejunoileum) are arranged in loops in the right quadrants of the body cavity.
What animal?
Birds
Located at the midpoint of the jejunoileum is ___ ___ or ___ ____, a remnant of the embryonic yolk sac.
Found in bird’s jejunum
Meckel’s diverticulum (diverticulum vitellinum)
This is often lacking in chickens and pigeons and is found only infrequently in ducks and geese.
Meckels diverticulum
Under Jejunum
