“Particles in bloodstream ?”

Blood test particles assessments refer specifically to Lipoproteins that are circulating in your plasma. Lipoproteins carry cholesterol and fatty acids and triglycerides principally. These particles are essential for the plasma carriage of proteins, some vitamins, the various cholesterol compounds, triglycerides and phospholipid compounds. The composition of a lipoprotein particle changes as it circulates throughout the bloodstream because these particles will release some carried compounds and will pick up other compounds. The function is "carriage protein."

So, particle count is a concentration per milliliter of plasma. The higher the particle count, the more concerned one would become, as the count reflects cholesterol and triglyceride principally. The particle count thus is an indicator of cardiovascular disease risk