This is the body s first line of defense. Mucus in produced in the mucus membranes contains antimicrobial proteins and other chemical defenses. Mucus secretions also trap particles such as bacteria. However, smoke from cigarettes temporarily paralyzes cilia, stops this cleaning process.
Smokers develop black lungs because airborne particulates accumulate in lungs.
When stimulated by antibody reaction, they react in accelerating cascade to create holes in cell membranes of target cells. Are included in both the non-specific and the specific immune system. Natural Killer Cells do not attack microorganisms directly, but rather destroy the body s own infected cells, especially cells harboring viruses, which can reproduce only within host cells. The natural killer cells also assault aberrant cells that could form tumors. Inflammation and Fever A nonspecific reaction to tissue damage.