Journal
JOURNAL OF MEDICAL ENTOMOLOGY
Volume 46, Issue 3, Pages 435-441Publisher
OXFORD UNIV PRESS INC
DOI: 10.1603/033.046.0304
Keywords
blood digestion; Triatominae; spherocrystals; perimierovillar membranes
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Funding
- Universidade Federal de Vicosa
- CAPES
- CNPq
- FAPEMIG
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This work studied the ultrastructure of the midgut cells of Cimex hemipterus Fabricius (Hemiptera: Cimicidae). The midgut of adult insects was analyzed on different days after a bloodmeal, and three anatomical regions with different digestive functions were apparent. In the anterior midgut, the digestive cells had many spherocrystals, lipid inclusions, and glycogen deposits, suggesting a role in water absorption, ion regulation, digestion, and storage of lipids and sugars. The digestive cells in the middle midgut contained secretory granules in the apical cytoplasm, lysosomes, rough endoplasmic reticulum, and spherocrystals, suggesting digestion and ion/water absorption. Also there was strong evidence that the posterior midgut may be the major site of nutrient absorption. The hematophagous heteropteran groups share many of thses blood digestion mechanisms.
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