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The document describes the external and internal anatomy of a fish. Externally, it mentions the dorsal fin, caudal fin, anal fin, ventral fin, and scales. Internally, it lists organs like the vertebrae, ovaries, urinary bladder, swim bladder, liver, stomach, intestines, gills, heart, pharynx, tongue, mouth with teeth, and branchial arches. The activity was carried out by 1st year secondary school students to learn about fish anatomy.






