Death - Senescence

Senescence

Almost all animals who survive external hazards to their biological functioning eventually die from biological aging, known in life sciences as “senescence”. One of the very few known possible exceptions is the jellyfish Turritopsis nutricula, thought to be, in effect, immortal. Unnatural causes of death include suicide and homicide. From all causes, roughly 150,000 people die around the world each day. Of these, two thirds die directly or indirectly due to senescence, but in industrialized countries—such as the United States, the United Kingdom, and Germany—the rate approaches 90%, i.e., nearly nine out of ten of all deaths are related to senescence.

Physiological death is now seen as a process, more than an event: conditions once considered indicative of death are now reversible. Where in the process a dividing line is drawn between life and death depends on factors beyond the presence or absence of vital signs. In general, clinical death is neither necessary nor sufficient for a determination of legal death. A patient with working heart and lungs determined to be brain dead can be pronounced legally dead without clinical death occurring. Paradoxically, as scientific knowledge and medicine advance, a precise medical definition of death becomes more problematic.

Read more about this topic:  Death

Other articles related to "senescence":

Senescence - Miscellaneous
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... Senescence, the biological effect of time on an organism Aging in dogs Aging in humans. ...
Antagonistic Pleiotropy Hypothesis - Adaptivity and Senescence
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List Of Pear Diseases - Miscellaneous Diseases and Disorders
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