Leyden jar and piston pump: what they have in common

1. Step 1. Leyden jar — evolved into — Capacitor. The Leyden jar was the first capacitor.
2. Step 2. Capacitor — is part of — Implantable defibrillator. A discharge capacitor.
3. Step 3. Implantable defibrillator — is made of — Titanium. The case is titanium.
4. Step 4. Titanium — is material for — Artificial heart. The case is titanium.
5. Step 5. Artificial heart — has part — Piston pump. A pulsatile pump.

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