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Appendix B. Chemical Abbreviations and Equations

Understanding the physiology and anatomy of the human body also requires understanding chemistry. Different chemicals and chemical reactions play a vital role in how our body functions. The below tables provide a list of different chemical names, and chemical equations that appear throughout the text for you to reference.

Table B1

Organs, organ systems, and the body as a whole make use of hundreds of different chemicals for various different processes and functions. Table B1 provides a list of the names and abbreviations of some chemicals featured throughout the book.

Common Chemicals
Name Abbreviation
Amino NH2
Ammonium ion NH4+
Ammonia NH3
Bicarbonate HCO3–
Calcium Ca2+
Carbaminohaemoglobin HbCO2
Carbon dioxide CO2
Carbonic acid H2CO3
Carboxyl COOH
Chloride Cl–
Dihydrogen phosphate ion H2PO4–
Glucose C6H12O6
Haemoglobin Hb
Hydrogen H+
Hydroxyl OH–
Iron Fe2+
Magnesium Mg2+
Nitric Oxide NO
Oxygen O2
Oxyhaemoglobin Hb-O2
Phosphate PO43-
Potassium K+
Sodium Na+
Sodium bicarbonate NaHCO3
Sodium Chloride NaCl
Sodium dihydrogen phosphate Na2H2PO4–
Urea CH2N2O
Water H2O

Table B2

In addition to the names of different chemicals, the book also includes several important chemical equations. Table B2 provides a select listing of some of the equations found throughout the text.

Common Chemical Equations
Chapter Equation
Chapter 26.4: Acid-Base Balance HCO3– + H+ ↔ H2CO3 ↔ CO2 + H2O
Chapter 26.4: Acid-Base Balance HCl + Na2H2PO4 → Na2H2PO4 + NaCl
Chapter 26.4: Acid-Base Balance NaOH + Na2H2PO4 → Na2H2PO4 + H2O
Chapter 26.4: Acid-Base Balance NaHCO3 + HCl → H2CO3 + NaCl
Chapter 26.4: Acid-Base Balance H2CO3 + NaOH → HCO3– + H2O
Chapter 22.5: Transport of Gases Hb + O2 ↔ Hb-O2
Chapter 22.5: Transport of Gases CO2 + Hb ↔ HbCO2

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Anatomy & Physiology 2e Copyright © 2025 by Lindsay M. Biga, Staci Bronson, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Kristen Oja, Devon Quick, Jon Runyeon, and OpenStax is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted.