RT Book, Section A1 Lehman-McKeeman, Lois D. A2 Klaassen, Curtis D. A2 Watkins, John B. SR Print(0) ID 6479853 T1 Chapter 5. Absorption, Distribution, and Excretion of Toxicants T2 Casarett & Doull's Essentials of Toxicology, 2e YR 2010 FD 2010 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-162240-0 LK accesspharmacy.mhmedical.com/content.aspx?aid=6479853 RD 2024/04/24 AB Absorption is the transfer of a chemical from the site of exposure, usually an external or internal body surface, into the systemic circulation.Toxicants are removed from the systemic circulation by biotransformation, excretion, and storage at various sites in the body.Excretion is the removal of xenobiotics from the blood and their return to the external environment via urine, feces, or exhalation.