The concept of death is a key to human understanding of the phenomenon. Main article: Medical definition of death However, as humans don't have the means to apply this to themselves, they have to use other ways to reach the maximum lifespan for a human, such as calorie reduction, dieting, and exercise. ĭeath is actively trying to be cured by a group of scientists known as biogerontologists, through seeking to do the same as biologically immortal organisms do and applying a similar means to humans. There may also be different customs for honoring the body, such as a funeral, cremation, or sky burial. Many cultures and religions have the idea of an afterlife and also may hold the idea of judgment of good and bad deeds in one's life. The most common reason is cardiovascular disease, which is a disease that affects the heart. As of the early 21st century, 56 million people die per year. Something that is not considered an organism, such as a virus, can be physically destroyed but is not said to die, as a virus isn't considered alive. ĭeath is generally applied to whole organisms the similar process seen in individual components of an organism, such as cells or tissues, is necrosis. Some believe that even if the brainstem is still alive, their personality and identity are dead, so therefore, they should be entirely dead. Some people believe that all brain functions must cease. Brain death was the next option, which fractured between different definitions.

However, the spread of CPR no longer meant it was irreversible. Initially, there was the definition of death when breathing and the heartbeat ceased. įiguring out when someone is dead has been a problem.

However, they can still die from other means than aging. Some organisms, are biologically immortal such as Turritopsis dohrnii. Death is an inevitable process that eventually occurs in all organisms. The remains of a former organism normally begin to decompose shortly after death. For organisms with a brain, death can also be defined as the irreversible cessation of functioning of the whole brain, including the brainstem, and brain death is sometimes used as a legal definition of death. The human skull is used universally as a symbol of death.ĭeath is the irreversible cessation of all biological functions that sustain an organism.

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