Fig. 2
From: Pathobiology of tobacco smoking and neurovascular disorders: untied strings and alternative products
Schematic illustration of a typical e-cigarette: This device mainly consists of a cartridge containing nicotine dissolved in an e-liquid which also contains flavoring agents; an atomizer that vaporizes the e-liquid and a rechargeable battery (sometimes with a LED indicator) that provides power to the atomizer. The atomizer and the cartridge are sometimes collectively called the cartomizer. The battery output and the resistance of the heating coils determine the vaping capacity of the device