BASIC-09: Physiologic Effects of Aging. Topics: Sarcopenia, Cardiovascular and Renal Decline, and Pharmacokinetic Implications — Part 1 (Part 1 of 2). Part of the Foundational Sciences series of the Reflex PM&R Board Review podcast. The full companion chapter and a linked board-style Q-bank set for this topic are at https://www.reflexpmr.com/read/BASIC-09-a.