Final answer:
Chemical buffers, respiratory system, and urinary system work together to maintain the pH range in the human body.
Explanation:
Chemical buffers, respiratory system, and the urinary system all play crucial roles in maintaining the pH range within the human body. Chemical buffers like bicarbonate ions and proteins, the respiratory system's regulation of CO2 levels, and the urinary system's excretion of acids and bases all contribute to keeping the pH within the optimal range of about 7.35 to 7.45.
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