Figure 3: Schemes of insect digestive tracts: A – typical insect; B – aphid; C – whitefly. AMg – ascending midgut, C – coecum; DMg – descending midgut; Fc – filter chamber, Fg – foregut; Gc- gastric coecum; Hg – hindgut; Mg – midgut; Mt – Malpighian tubule; Oe – oesophagus; R – rectum; Rc – rectal sac; St - stomach. Anatomical gut structures associated with water-shunting in aphids and whiteflies are depicted in B and C, respectively.