To understand how vaccines work, it is helpful to rst look at how the body ghts illness. When germs, such as bacteria or viruses, invade the body, they attack and multiply. This invasion is called an infection, and the infection is what causes illness. The immune system uses several tools to ght infection. Blood contains red blood cells, for carrying oxygen to tissues and organs, and white or immune cells, for ghting infection. These white cells consist primarily of B-lymphocytes, T-lymphocytes, and macrophages:
Answer:
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Explanation:
Inflammation is a process - a series of cellular changes that signal the body's response to injury or infection. It can be caused by physical agents, chemical stimuli and biologic agents (bacteria, viruses). The leukocytes <span> are involved in the initiation and maintenance of </span>inflammation.
Inflammation brings more leukocytes to the sight of infection. T<span>he process of leukocyte movement from the blood to the tissues through the blood vessels is known as </span>extravasation<span>,</span>
The answer is demanding and responsive because they need to get in touch with in cause of an emergency
