Avian GI

Lecture 26

What is the purpose of the variant types of beaks amongst species of birds?

different diets

T/F: There is no soft palate in the avian species.

True

What is the term for the normal cleft found on the media plane?

Choana (CO-A-NA)

#3?

Choana

What is the space within the beak to the esophagus?

Oropharynx

What is the oropharynx line with and what is the purpose?

Papillae, encourage food toward esophagus

Which species have papillae on the sides of the tongue and bill that sift out food?

Aquatic Species

What is the main function of the avian tongue?

collect, manipulate, and swallow food

T/F: Birds have an outstanding sense of taste.

False

What is the process of deglutition of birds?

Tip head back and use gravity (particularly water)

What is shown by the arrow?

the crop

What side is the esophagus found on?

right

What is the purpose of the crop?

stores food

What species have no crop?

owls, gulls, penguins

T/F: If a fish spans the mouth to stomach of the bird, they are at risk of choking.

False

Which type of avians have developed specialized stomachs?

herbivores (chickens, ducks, geese)

What is shown by the purple arrow?

Proventriculus

What is show by the blue arrow?

Ventriculus (gizzard)

What is the function of the proventriculus mucosa?

secretes acid and mucus to protect the walls from acid

What is the function of the ventriculus (gizzard)?

mechanically break down feed with grit (rock, sand, shell)

#3?

Duodenum

#5?

Jejunum

#7?

ileum

#9?

Ceca

#11

Colorectal

What is the main function of colorectum?

water resorption and electrolytes

What is shown?

Cloaca

What is the term for anus of the birds?

Vent

#10?

Coprodeum

#11?

Urodeum

#12?

Proctodeum

What part of the cloaca is where feces are stored?

Coprodeum

What part of the cloaca is where the urinary tract opens?

Urodeum