Different body fluids maintain specific pH levels essential for physiological functions: blood maintains a pH of 7.4 (slightly alkaline), stomach juice has a pH of 2 (highly acidic for digestion), pancreatic juice has a pH of 8 (alkaline to neutralize stomach acid), skin has a pH of 5.5 (slightly acidic for protection), and vaginal fluid has a pH of 4.5 (acidic for protection against infections).
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