Oncology & Cancer

Targeting cell division in pancreatic cancer

Pancreatic cancer is one of the deadliest cancers, with patients surviving on average less than a year once the disease has spread. There is an urgent need to evaluate more therapeutic targets. The chemotherapeutic agent ...

Medications

Time for action: UK drug deaths continue to rise

Every year since 2013, the UK's Office for National Statistics has reported an increase in drug-related deaths in England. Last year, we reported that drugs had overtaken traffic accidents as a leading cause of death. This ...

Diseases, Conditions, Syndromes

40 dead in Bangladesh's worst-ever dengue outbreak

At least 40 people have died in Bangladesh's worst-ever outbreak of dengue, officials said Tuesday, as overburdened hospitals struggled to treat thousands of patients.

Neuroscience

Tissue model reveals role of blood-brain barrier in Alzheimer's

Beta-amyloid plaques, the protein aggregates that form in the brains of Alzheimer's patients, disrupt many brain functions and can kill neurons. They can also damage the blood-brain barrier—the normally tight border that ...

Psychology & Psychiatry

Scientists discover how chronic stress causes brain damage

DGIST announced on July 2 that Professor Seong-Woon Yu's team in the Department of Brain and Cognitive Sciences discovered that chronic stress causes autophagic death of adult hippocampal neural stem cells (NSCs). These findings ...

Psychology & Psychiatry

What 'The Lion King' teaches us about children's grief

The Lion King is a movie about a young lion cub named Simba, who idolizes his father, King Mufasa, and is eager for his own royal destiny. Scar, former heir to the throne before Simba's birth, sends Mufasa to his death and ...

page 1 from 23

Death

Death is the permanent termination of the biological functions that define a living organism. It refers to both a particular event and to the condition that results thereby. The true nature of the latter has for millennia been a central concern of the world's religious traditions and of philosophical enquiry. Many religions maintain faith in either some kind of afterlife or reincarnation. The effect of physical death on any possible mind or soul remains for many an open question.

Animals almost without exception (see hydra) die in due course from senescence. Intervening phenomena which commonly bring death earlier include malnutrition, predation, disease, accidents resulting in terminal physical injury, or, in extreme circumstances, grave ecosystem disruption. Intentional human activity causing death includes suicide, homicide, and war. Roughly 150,000 people die each day across the globe. Death in the natural world can also occur as an indirect result of human activity: an increasing cause of species depletion in recent times has been destruction of ecological systems as a consequence of the widening spread of industrial technology.

Death in this context is now seen as less an event than a process: 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. Precise medical definition of death, in other words, becomes more problematic, paradoxically, as scientific knowledge and technology advance.

This text uses material from Wikipedia, licensed under CC BY-SA