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Evolution Of Immunity And The Invertebrates
Part I of Essay
"Article Summery" Name: "Immunity and the Invertebrates" Periodical: Scientific
Pages Read: 9
The complex immune systems of humans and other mammals evolved over
quite a long time - in some rather surprising ways. In 1982 a Russian zoologist
named Elie Metchnikoff notice .... Part II of Essay
.... into how immunity works.
The most basic requirement of an immune system is to distinguish between
one's own cells and "non-self" cells. The second job is to eliminate the non-
self cells. When a foreign object enters the body, several things happen. Blood
stops flowing, the immunity system begins to eliminate unwanted microbes with
phagocytic white blood cells. This defensive mechanism is possessed by all
animals with an innate system of immunity. Innate cellular immunity is believed
to be the earliest form of immunity. Another form of ....
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Words: 1152 - Pages: 5
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