Fig. 5
From: Morphological responses to feeding in ticks (Ixodes ricinus)
Ixodes ricinus, LM micrographs of the midgut diverticula in fasting, semi-engorged, and fully engorged females. a cross-section through a midgut diverticulum of a fasting tick. b Epithelium of two neighboring midgut diverticula of an early feeding stage tick. c Epithelium of two neighboring midgut diverticula of a semi-engorged tick. d High-power micrograph of an individual digestive cell in the epithelium of a midgut diverticulum of a semi-engorged tick. e High-power micrograph of the epithelium of a midgut diverticulum directly under the epidermis (f) Epithelium of two adjoining midgut diverticula of a fully engorged tick. Abbreviations: C, cuticle; dDGC, degenerative digestive cell; DGC, digestive cell; EPD, epidermis; H, hemolymphatic space; LMGD, lumen of the midgut diverticula; MC, muscle cell; rDGC, resting digestive cell; S, stem cell; SC, secretory cells; T, trachea; VS, vesicles; arrowheads point to the marginal zone of small, intensively staining vesicles. All scale bars 50 μm