Visual explanation of acid-base balance in the human body, including the role of carbon dioxide, water, and bicarbonate ions, and the kidney's function in maintaining pH homeostasis.
Diagram illustrating acid-base balance in the body, showing the chemical reaction CO₂ + H₂O ⇌ H₂CO₃ ⇌ H⁺ + HCO₃⁻, a pH scale from acidic to basic, a seesaw balancing acid and base, and a human kidney with associated blood vessels.