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.
One of the most important functions of the macrophages is that they can activate the acquired immune system! After a macrophage has eaten and digested a particle, it displays some of the broken down germ proteins (antigens) on its cell surface.These antigens act as identification signals for Helper T cells.acrophages are not the only types of cells that function through phagocytosis. There are other important swallowing cells that make up the immune system, such as cells called granulocytes, neutrophils and dendritic cells.