Cellular Death
Definition
Progressive death of individual cells after somatic death; different tissues die at different rates (cornea minutes, nerve cells hours, fibroblasts up to 24 hours).
- Definition
- Progressive death of individual cells after somatic death
- Cornea
- Dies within minutes
- Nerve cells
- Die within hours
- Fibroblasts
- Can survive up to 24 hours
- Relevance
- Basis for tissue and corneal transplant time windows
Common questions
How does cellular death differ from somatic death?+
Somatic death is the death of the organism as a whole, marked by cessation of circulation, respiration and brain function. Cellular death follows afterward as individual tissues, each with different oxygen and metabolic demands, die at their own rates.
Why does the varying rate of cellular death matter forensically?+
Because tissues retain some viability or responsiveness for different periods after somatic death, this staggered die-off underlies certain post-mortem tests, such as electrical or mechanical excitability of muscle, used to help estimate time since death.
Related terms
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- Algor Mortis
- Postmortem cooling of the body toward ambient temperature, approximately 1-1.5 degrees Celsius per hour under average conditions. Used alongside other postmortem changes...
- Bichat's Trio
- The three modes of death: coma (cerebral failure), asphyxia (respiratory failure), syncope (cardiac/circulatory failure). Named after Xavier Bichat, 1800.
- Brain Death
- Irreversible cessation of all functions of the entire brain, including the brainstem. Defined under Harvard criteria 1968 and adopted in India under...
- Somatic Death
- The irreversible cessation of vital functions of the organism as a whole: cardiac activity, respiratory activity, and integrated neurological function. The threshold...