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Evolution Of Immunity And The Invertebrates
Part 1 of Paper
.... 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 starfish larva. When he
inserted a foreign object through it's membrane, tiny cells would try to ingest
the invader throug.... Part 2 of Paper
....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 innate immunity is
complement, composed of 30 different proteins of the blood.
If these mechanisms do not work to defeat an invader, vertebrates rely
on another response: acquired imm.... |
| Number of words: 1152 - Approximate pages: 5 |
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