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Thread: Some Parts of Body Stay 'Alive' After Death

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    Some Parts of Body Stay 'Alive' After Death




    Every minute, around 108 people die on this planet – but the moment of death doesn’t actually mean every part of the body is dead.

    In fact some cells stay live – and some chemical processes actually increase after death, according to a study in Open Biology.

    Talking to Live Science, Peter Noble of the Unviersity of Washington said, ‘Not all cells are ‘dead’ when an organism dies. Different cell types have different life spans, generation times and resilience to extreme stress.

    ‘It is likely that some cells remain alive and are attempting to repair themselves, specifically stem cells.

    ‘Inner ear stem cells from mice can be cultured after 5–10 days postmortem and connective tissue cells from goats can be cultured for 41 – 160 days postmortem.’

    Researchers found that gene expression – a chemical process involving genetic instructions – actually increases after death, in tests on zebrafish.





    Stem cells are undifferentiated biological cells that can differentiate into more specialised
    cells and divide to produce more stem cells. They are found in multicellular organisms.


    In mammals, there are two broad types of stem cells: embryonic stem cells, which are isolated from the inner cell mass of blastocysts, and adult stem cells, which are found in various tissues. In adult organisms, stem cells and progenitor cells act as a repair system for the body, replenishing adult tissues. In a developing embryo, stem cells can differentiate into all the specialized cells—ectoderm, endoderm and mesoderm but also maintain the normal turnover of regenerative organs, such as blood, skin, or intestinal tissues.




    Instead of shutting down all at once, gene transcription shuts down slowly in a step-wise shutdown’, the researchers say.

    The find does not mean that people or animals can be brought back to life – but it could provide important insights into cancer, and organ transplants, Dr Noble said.




    Source: https://ca.news.yahoo.com/parts-of-t...143323801.html


    peace...

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