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The _____ is the connecting segment between pharynx and stomach.
Esophagus
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_____ is lined by stratified epithelium.
Esophagus
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Describe the glands of the esophagus.
There are no large glands.
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What are some special structures of the esophagus?
Papillae, folds, and crops.
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Describe the location and function of the crop.
A sac in the caudal portion of the esophagus found in grain and seed eating vertabrates, especially birds.
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What is a sphincter?
Bands of smooth muscle that close off the openings to and from the stomach.
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Describe the location and function of gastric glands.
- They are simple tubular glands.
- Usually located in body and fundus of stomach.
- Secrete HCL and pepsinogen, involved in protein digestion.
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Describe the location and structure of the gizzard.
Specialized posterior region of stomach wall, which is thick, muscular, and proteinacerous.
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The anterior portion of the gizzard becomes known as the _____.
proventriculus
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In what animals can the gizzard be found?
- Birds
- Some fish
- Some reptiles (crocodilians)
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What is the function of ruminant stomachs?
adapted to process large amounts of cellulose.
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What are the four cow stomachs?
- Rumen
- Reticulum
- Omasum
- Abomasum
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Which of the four stomachs are lined with stratified epithelium?
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Which of the four stomachs are lined with columnar epithelium?
Abomasum
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