Evolution Of Immunity And The Invertebrates
Beginning of paper
"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 noticed a unique property of st ....
Middle of paper
.... the immune defenses of past and
current creatures. They gained further insight 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
ani ....
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Page count: 5 (approximately 250 words per page)