Leon

Leon

Vocabulary:
 * Leukocytes: An alternate name for white blood cells. White blood cells are the cells that defend your body from invaders.
 * Pathogens: Pathogens is the general name for microorganisms that can infect your body. The three main pathogens are: Bacterial cells, Viral cells, and Fungi cells. Pathogens infect your body for an attempt of colonization, because everything living organism needs a home; so they decide that the human body is most suitable. Pathogenic cells infect your body through obvious entries such as your nose and mouth, and can also get through via cuts/flesh wounds.
 * Infections: Infections happen because of pathogenic cells entering your body, via cuts/flesh wounds or through your mouth & nose. Infections such as the common cold can be contagious, meaning that it is airborne (can travel through the air around us) or through a simple touch. Colds are often caught because someone around us is sick and he/she sneezes or coughs causing their infectants to fly through the air, infecting other hosts.
 * 1st line of defense: The first line of defense in everyones system are the physical barriers, the ones that are visible to the naked eye. This line consists of Cilia, Skin, Mucous, etc. The ones that are obvious and cover your insides. The skins job is to primarily keep pathogens out, but sometimes they can get through via cut. The skin has billions of bacterial cells crawling all over, but these bacteria are friendly and are intent on getting rid of the bacteria cells that try to get through. This bacterial type is called "Skin Flora". The Mucous has one job, that is to trap the pathogens that try to get through. Your insides have a special lining of mucous that can trap pathogens while your cilia pushes the mucous to the mouth allowing you to swallow it into the stomach where it will be digested.
 * 2nd line of defense: The second line consists of non-specific white blood cells, these are following under the category/term of "phagocyte". Phagocytes patrol your bloodstream in search for pathogens that lurk around, trying to infect you. Once a phagocyte has found a pathogen, it will engulf it, and trap it inside of a vesicle while it is digested by enzymes. This line of defense is called non-specific because it only attacks pathogens that are foreign or seem to be an invader.
 * 3rd line of defense: The third line is the specific white blood cells, they have the role of finding pathogens and exterminating them, the ones that have already infected or are known as infections. This line consists of primarily T-cells and B-cells. T-cells have the job of memorizing pathogens that have been inside of you before, while cytotoxic T-cells release preforin which exterminates the pathogen. B-cells have the job of sending antibodies that attach themselves to pathogens to exterminate or flag down an infectant. B-cells signify these pathogens by the cell surface, whether it is altered or not; for example, cancer cells have very distinct and changing surfaces. As a team, they work together to fend off the pathogens.
 * NK cells: Natural Killer cells, A.K.A. NK cells, is the general description of leukocytes that rely on the alteration of the cell surface, such as the B-cell. NK cells can send out enzymes that digest the pathogens, can engulf or even send out antibodies to eliminate the pathogen to stop it from progressing any further.



Immunology: The immune system consists of white blood cells, or Leukocytes. The immune system has Non-specific leukocytes and specific leukocytes.

Non-specific consists of phagocytic cells, meaning that they locate any foreign or infected looking pathogens and engulfs them, trapping them in a vesicle that spews out and enzyme that digests the pathogen into simple protein and sugar. The specific line of defense consists of leukocytes that can locate cells that are primarily harming your body rather than helping it. This consists of leukocytes such as T-cells or B-cells. T-cells can memorize previous invaders and release preforin to eliminate it and B-cells can locate cells with altered cell surfaces and send antibodies to flag down invaders or eliminate on go.