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Fig. 6. Anatomy of the digestive zone (light microscopy). (A) Transverse section of the pitcher wall. (B) Longitudinal and (C) transverse sections of the gland, general view. (D) Longitudinal section of the glandular head. (E-G) Transverse sections of the gland. Arrows show the direction to the peristome. CU, cuticle; EC, endodermoid component; ED, epidermal depression; GH, glandular head; HD, hood; IE, inner epidermis; IM, inner margin of the cell wall; IW, internal cell wall; LW, lateral cell wall; ME, mesophyll; OE, outer epidermis; OM, outer margin of the cell wall; OW, outer cell wall; SI, secretion inclusion; SL, second layer of cells; TL, third layer of cells; TR, tracheid element. Scale bar: A,D, 20 µm; B,C,E-G, 50 µm.