Biology
A tiny cut bleeds. Then it stops. What your body just did in 10 minutes would take engineers weeks to design.
Blood clotting is a cascading chemical relay that turns liquid blood into a tough fibrin mesh, sealing wounds quickly while trying to keep the clot limited to the injured area.
Cascade system
Many clotting proteins activate one another in sequence.
Platelets are fragments
Platelets are cell fragments from megakaryocytes, not full cells.
Aspirin lasts
Aspirin disables platelet clotting ability for the platelet's lifespan.
Clots are removed
Fibrinolysis dissolves clots after repair.
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