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10 results
  • Intestinal bacteria
  • Intestinal bacteria
  • Intestinal bacteria
  • Intestinal bacteria
  • Intestinal bacteria
  • Intestinal bacteria
  • Microvilli on epithelial cells
  • Kidney - proximal convoluted tubule
  • Kidney - proximal convoluted tubule
  • A physician examining a urine flask. Oil painting after G. Dou.