How does the human body defend itself against pathogens?
In general, your body fights disease by keeping things out of your body that are foreign.
Your primary defense against pathogenic germs are physical barriers like your skin.
You also produce pathogen-destroying chemicals, like lysozyme, found on parts of your body without skin, including your tears and mucus membranes..
Which cells break down pathogens?
Lymphocytes are immune cells found in the blood and lymph tissue. T and B lymphocytes are the two main types. Macrophages are large white blood cells that reside in tissues that specialize in engulfing and digesting cellular debris, pathogens and other foreign substances in the body.
How do you kill pathogens?
The antibodies destroy the antigen (pathogen) which is then engulfed and digested by macrophages. White blood cells can also produce chemicals called antitoxins which destroy the toxins (poisons) some bacteria produce when they have invaded the body.
What is the 1st 2nd and 3rd line of defense?
The first line of defense are the physical and chemical barriers, which are considered functions of innate immunity. … The third line of defense is specific resistance, which is considered a function of acquired immunity.
What three ways can white blood cells protect us from invading pathogens?
Different types of white blood cells respond in one of three different ways to the presence of a pathogen in the body:They can produce antitoxins which stop the toxins produced by some bacteria from damaging the cells.Lymphocytes produce antibodies which attach to the antigens of a particular type of bacteria or virus.