Local osmotic gradients in the rectal pads of an insect.
D000818:Animals; D001692:Biological Transport; D003377:Countercurrent Distribution; D004058:Diffusion; D004231:Diuresis; D004848:Epithelium / Q000502:physiology; D007313:Insecta / Q000502:physiology*; D007408:Intestinal Absorption; D007671:Kidney Concentrating Ability; D008317:Malpighian Tubules / Q000502:physiology; D009994:Osmolar Concentration; D012007:Rectum / Q000166:cytology / Q000502:physiology*; D014867:Water / Q000378:metabolism*
D014867:Water