Suppose an anesthetic enters a capillary below the skin and continues its journey through structures of the circulatory system. ? Along what sequence of structures does the anesthetic continue its journey? A. Vein, artery, heart, venule, arteriole b. Arteriole, venule, heart, artery, vein c. Venule, arteriole, heart, vein, artery d. Venule, vein, heart, artery, arteriole

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i think its the first one

the answer is d p: cell, q: organ, r: organ system, s: tissue