The number of thrombocytes per microliter of blood, normally 150,000-450,000/μL. Platelets are essential for blood clotting and preventing bleeding.
From French 'plaquette' meaning 'little plate,' named by Giulio Bizzozero in 1882 for their flat, disc-like shape. The diminutive suffix reflects their tiny size - they're the smallest blood cells.
Platelets aren't even complete cells - they're just fragments of giant bone marrow cells called megakaryocytes! One megakaryocyte can shatter into 2,000-3,000 platelet pieces, like a cellular piñata bursting with clotting power.
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