Organ transplantation and piston pump: what they have in common

1. Step 1. Organ transplantation — uses — Blood groups. Compatibility.
2. Step 2. Blood groups — is used in — Blood transfusion. Compatibility of blood groups.
3. Step 3. Blood transfusion — uses — IV drip. A transfusion set.
4. Step 4. IV drip — has part — Syringe. A needle.
5. Step 5. Syringe — works like — Piston pump. A syringe is a hand-operated piston pump.

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