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Fig. 7. Anatomy of the digestive zone (fluorescence microscopy). (A,B) Transverse section of the gland in a light (A) and fluorescence microscope (B). (C) Whole-mounted surface preparation in a fluorescence microscope. Arrow shows the direction to the peristome. EC, endodermoid component; HD, hood; OW, outer cell wall. Scale bar: 100 µm.