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This is a free sample preview of the essay
Evolution Of Immunity And The Invertebrates
Beginning 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 noticed a unique property of st ....
Middle of essay
....hese mechanisms do not work to defeat an invader, vertebrates rely
on another response: acquired immunity. Acquired immunity is mainly dealt by
specialized white blood cells called lymphocytes. Lymphocytes travel throughout
the blood and lymph glands waiting to attack molecules called antigens.
Lymphocytes are made of two classes: B and T. B lymphocytes release antibodies
while T help produce antibodies and serve to recognize antigens. Acquired
Immunity is highly effective but takes days to acti.... |
| Number of words: 1152 |
Approximate pages: 5 |
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