Death

Death is the permanent cessation of all functions that sustain an organism, and figuring out when somebody is dead has been a persistent issue. Death is applied to whole organisms, and it is actively trying to be cured by some scientists, but people do not have the means to apply this to themselves, so to reach athe maximum lifespan of a human, calorie reduction, dieting and exercise is optimal to mitigate death. However, death can be a sad, or tragic experience to hear about, especially for others who witnessed it.

Explanation
Senescence may also refer to a scenario where a human or other animal survives all calamities but eventually dies due to causes of old age. On the opposite spectrum, premature death can relate to a death before old age arrives, like for example, when someone died before reaching the age of 75, with biological aging being a factor. Unnatural causes of death may include accidents, suicide and predation, and commemoration ceremonies after someone passes away, like a funeral, and is the center of many traditions and organizational groups, alongside customs about death appearing around the world and mummification or embalming is used to slow the rate of decay.

Ceremonies relating to death may include funerals and mourning, and ceremonies of honoring the dead individual, with the physical remains of a person, known as a corpse or body, are either buried or cremated, with the latter being more popular. One of the most common ways to pass away is from heart disease, often afflicting older adults and the elderly especially, but certain causes of death can be preventable in some instances. In some poorer regions in the world, especially in developing countries infectious diseases which could've been prevented take them out, but most die of age-related causes.

If the death is seemingly suspicious, then a pathologist will then perform an autopsy on the deceased, either performed for legal or medical purposes, with a forensic autopsy carried out if the death is due to murder or by illegal means, while academic autopsy is to find the cause of death medidcally and used in cases of unknown or uncertain death itself. Permission from the deceased's next of kin may be needed for internal autopsy in some cases, but once the autopsy is complete, the body is sewed back together and then embalmed.

Signs
Several signs of death in people are included in their final moments, as a dying individual will be cold to the touch, and their body shutting down, so signs that someone has passed away may include the following things:
 * No heartbeat or pulse
 * No breathing
 * Relaxed muscles
 * Fixed eyes
 * Completely unresponsive
 * A bowel or bladder release
 * Partially shut eyelids