Science2 - 00053

Science2 - 00053 - Untitled stoppage of bodily life The...

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Untitled stoppage of bodily life? The Beginning of Natural Death There are three chief kinds of death, (_a_) The great majority of animals come to a violent end, being devoured by others or killed by sudden and extreme changes in their surroundings. (_b_) When an animal enters a new habitat, or comes into new associations with other organisms, it may be invaded by a microbe or by some larger parasite to which it is unaccustomed and to which it can offer no resistance. With many parasites a "live-and-let-live" compromise is arrived at, but new parasites are apt to be fatal, as man knows to his cost when he is bitten by a tse-tse fly which infects him with the microscopic animal (a Trypanosome) that causes Sleeping Sickness. In many animals the parasites are not troublesome as long as the host is vigorous, but if the host is out of condition the parasites may get the upper hand, as in the so-called "grouse disease," and become fatal. (_c_) But besides violent death and microbic (or parasitic) death, there is natural death.
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