For the coloring process, see Dyeing. Death is the cessation of all biological functions that sustain a living organism. The concept and symptoms of death, and varying degrees of delicacy used in discussion in public forums, have generated numerous scientific, legal, and socially acceptable drawing still life in stages for children presentation or euphemisms for death.
When a person has died, it is also said they have passed away, passed on, expired, or are gone, among numerous other socially accepted, religiously specific, slang, and irreverent terms. Senescence refers to a scenario when a living being is able to survive all calamities, but eventually dies due to causes relating to old age. Animal and plant cells normally reproduce and function during the whole period of natural existence, but the aging process derives from deterioration of cellular activity and ruination of regular functioning. Almost all animals who survive external hazards to their biological functioning eventually die from biological aging, known in life sciences as “senescence”. Some organisms experience negligible senescence, even exhibiting biological immortality. 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.
Decomposition, the reduction into simpler forms of matter, accompanied by a strong, unpleasant odor. Ivory pendant of a Monk’s face. The concept of death is a key to human understanding of the phenomenon. There are many scientific approaches to the concept. For example, brain death, as practiced in medical science, defines death as a point in time at which brain activity ceases. One of the challenges in defining death is in distinguishing it from life.
As a point in time, death would seem to refer to the moment at which life ends. Determining when death has occurred is difficult, as cessation of life functions is often not simultaneous across organ systems. Such determination therefore requires drawing precise conceptual boundaries between life and death. It is possible to define life in terms of consciousness. When consciousness ceases, a living organism can be said to have died. Another problem is in defining consciousness, which has many different definitions given by modern scientists, psychologists and philosophers.
Other definitions for death focus on the character of cessation of something. In this context “death” describes merely the state where something has ceased, for example, life. Thus, the definition of “life” simultaneously defines death. Historically, attempts to define the exact moment of a human’s death have been subjective, or imprecise. It is presumed that an end of electrical activity indicates the end of consciousness. The category of “brain death” is seen as problematic by some scholars. Those people maintaining that only the neo-cortex of the brain is necessary for consciousness sometimes argue that only electrical activity should be considered when defining death.