Avian Digestive System
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What is the site of gastric juice secretion?
the proventriculus
The proventriculus is the site of what?
Gastric juice secretion of hydrochloric acid, no food grinding happens here
What are the pH levels in the proventriculus?
4
Ingesta passes through the proventriculus how fast?
Rapidly
What’s another name for the gizzard?
The ventriculus
The ventriculus is also called the what?
The gizzard
What do the thick, muscular walls of the ventriculus do?
They reduce the particle size of ingesta. Feed is grinded into small particles
What is grit and what does it do?
Grit is small stones and sand that aid in grinding ingested feed
*The stomach of a bird is equal to what 3 things?
• The crop • The proventriculus • The ventriculus (gizzard)
The crop is basically what?
• Pre stomach • An enlargement of the esophagus where feed can be stored • Food passes from here to the proventriculus
A birds saliva contains?
Salivary amylase
The small intestine contains most mammalian specie enzymes except?
Lactase
Why are a birds pH levels slightly acidic?
Because birds don’t drink as much water
How long is a birds small intestine?
It’s very short (2-4inches)
What is the site of egg laying and spermatozoa deposition during mating?
The cloaca
The cloaca is the site of?
Egg laying and spermatozoa deposition during mating
The LI empties into the what?
Cloaca
What are the functions of the esophagus?
• It holds and moistens ingesta • Salivary amylase action on ingesta begins here
Where does feed go after it is in the ventriculus?
It empties into the small intestine
Where does ingesta from the small intestine empty to?
The large intestine
After food has passed through large intestine, where does it go?
The cloaca and then out through the vent