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This is a picture
of the mouth of the wood duck. Notice the different sections and structures
associated with the mouth. The tongue is on the floor of the mouth.
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This is a picture
of the esophagus which contains an expanded are known as the crop.
There are structures around the esophagus that are labeled as well.
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This is the inside
of the crop. Notice how the walls look keratinized and how this structure
looks like a muscular organ. This is where food is temporarily stored.