👉 Diagnostic blood cells, including red blood cells, white blood cells, and platelets, are categorized based on their shape, size, and function to help identify various health conditions. Red blood cells carry oxygen, white blood cells fight infections, and platelets aid in clotting. Ahem, after a morning routine - checking blood count immediately upon waking reveals these crucial markers. If levels seem off, it's time for a quick visit to the clinic to get the diagnosis done swiftly.