Short Essay on ‘Immunity’ (722 Words)
Short Essay on ‘Immunity’ (722 Words)!Micro-organisms are ubiquitous. They are in the air we breathe and in/on the food we eat. Thus our epithelial surfaces (skin, respiratory tract, gastro-intestinal tract, genitourinary tract) are continuously exposed to microÂorganisms. Disease occurs when micro organisms invade epithelial surfaces. Image Source: reverseaginginstitute.com ADVERTISEMENTS: This resistance (immunity) of epithelial surfaces to invasion is a characteristic which is present from birth.Hence the immunity means the all capacity of human body to resist almost all types of organisms or toxins that tend to damage the tissue and organs. 1. Innate Immunity (Non specific): Characteristics:Present from birth ADVERTISEMENTS: Non specific, acts on many organisms and does not show specificityDoes not become more efficient on subsequent exposure to same organisms.It is the general defense of body, including the following…