The inflammatory response serves as a safeguard mechanism that can eradicate invading pathogens, permitting the tissue to heal. Changes during the cellular and vascular stages result in the collection of fluid, dead tissue cells, and white blood cells at the site of inflammation. This exudate has a high protein and cellular debris content. The inflammatory exudate varies in composition. It may be serous, sanguineous or purulent. Serous exudate contains a clear, or amber colored fluid similar to plasma, which consists mainly of electrolytes and sugar. It may also contain a minimal amount of proteins, white blood cells, or certain microorganisms. Sanguineous or hemorrhagic exudate mainly consists of red blood cells, whereas purulent, also called suppurative exudate, mostly contains white blood cells and bacteria. In addition, the fluid increase dilutes the toxins and increases lymphatic drainage, which removes waste products and the pathogen. The protein accumulation brought in due to the vascular response contains globulin proteins involved in blood clotting and fighting infection. It also brings in fibrin, which forms a mesh-like matrix that helps prevent the spread of bacteria and promotes healing.