In this video we see a white blood cell moving through blood plasma (speeded up). This particular immune cell is called a Neutraphil which is chasing a bacterial form and doesn’t stop until it engulfs it. These cells are capable of phagocytizing (ingesting) foreign cells, toxins, bacteria and viruses. Once ingested, these potentially harmful organisms are destroyed by the release of reactive materials such as acids and enzymes. When infection is present the WBC’s increase in number, they also become more mobile, they move back and forth between the blood, lymph and tissues. There are several different type of WBC each with its own unique function. Neutrophils are capable of ingesting toxins, foreign cells, bacteria and viruses. Eosinophils are designed to deal with parasitic infections while Basophils are chiefly responsible for allergic and antigen response.  

Lymphocytes are responsible for immunity and Monocytes defend the body against viruses and bacteria.