The document appears to be an instructional text prompting the reader to label different parts of the digestive system by filling in blanks with organ and duct names. It lists key digestive organs like the liver, gallbladder, stomach, small intestine and large intestine. It also mentions structures like the pyloric sphincter and rugae in the stomach as well as the pancreas, esophagus and parotid and submandibular glands. The reader is encouraged to identify the missing labels themselves.
