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 manner in which we're able to deal with sickness normally depends on the strength of our immune system. One of the main tools in the arsenal of our immune system is a group of specialized cells known as lymphocytes. Lymphocytes are a type of white blood cell that function as part of the immune system. Their various functions allow them to properly respond to foreign invaders in the body. Some lymphocytes work alone, while others are able to coordinate with other cells.