The Human Immune Response : A Complex, Layered System Essay

1232 Words Oct 16th, 2016 5 Pages
The human immune response is a complex, layered system that uses multiple defense mechanisms which function in harmony to protect the body from infection and illness. There are two main types of immune response, the innate and acquired, and while these responses are related and sometimes overlap, they use separate processes to defend against invaders. Working as a whole, innate and acquired immune responses protect the body from infectious organisms. Infectious organisms that can cause disease include “bacteria, viruses, protozoans, fungi, parasites and prions (infectious proteins)” that are known as pathogens (Goodenough 238). There are three types of protection against pathogens in the human body. They are physical barriers, the chemical defenses against attack provided by the white blood cells, and destruction of foreign organisms in the body through specifically targeted defenses of acquired immunity. These protections can be classified as either innate or acquired immunity. Innate immunity is different from acquired response because it is present at birth and is not learned through exposure to pathogens. Unlike acquired immunity, it “does not remember specific foreign antigens and does not provide ongoing protection against future infection”, a key difference as acquired immunity relies on memory as a defense mechanism (Delves, “Innate Immunity”). The innate system uses a combination of physical barriers such as skin and mucous membranes as well as surface and…

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