Freelancing is not just a U.S. phenomenon, but is now spreading around the world. There are approximatly 53 million freelancers in the U.S. contributing $715 billion in earnings to the national economy. 80% of all workers in the U.S. surveyed said they would do work on the side if it came to them to earn extra money.
The Phagocytes. Phagocytes are the soldiers of the immune system, and provide innate immunity. They are responsible for swallowing, killing and digesting invading microbes. The process of swallowing microbes is known as phagocytosis.There are two main types of phagocyte. 1  Microphages. 2  These cells are also known as Polymorphonuclear Leucocytes, PMNs and Polymorphs. 3  These cells start life in the bone marrow. 4  They are constantly circulating in the blood.he process of swallowing microbes is known as phagocytosis. There are two main types of phagocyte. 1  Microphages. 2  These cells are also known as Polymorphonuclear Leucocytes, PMNs and Polymorphs. 3  These cells start life in the bone marrow.
The immune system is made up of a complex network of cells and organs that protect the body from infection. The Immune System-Click to Enlarge. Lymph nodes are part of the immune system. They release lymphocytes, a certain type of white blood cell that fights infection.The blood vessels and lymph vessels carry the lymphocytes to and from different areas in the body.Each lymphoid organ plays a role in the production and activation of lymphocytes.he immune system is made up of a complex network of cells and organs that protect the body from infection. The Immune System-Click to Enlarge. Lymph nodes are part of the immune system. They release lymphocytes, a certain type of white blood cell that fights infection.