Internal anatomy of a fish booklets! This learning resource contains a two booklets for the internal parts of a fish- a blank student workbook and a resource/ answer book with information on each organ. Internal organs included in this booklet: fish, brain, spinal chord, heart, spleen, gills, digestive system, esophagus, stomach, liver, gallbladder, intestines, kidney, bladder, and swim bladder. If you would like to expand on this topic, check out my internal parts of a fish diagram and 3 part c