news.volyx.in

Why is the liver so weirdly regenerative? (dynomight.substack.com)

576 points by jbotz · 17 days ago · 293 comments on HN

Article summary

The article discusses the human body's limitations and vulnerabilities, such as the kidneys' decay and the brain's inability to regenerate neurons, and contrasts them with the liver's unique ability to regenerate. The author proposes that the liver's regenerative capabilities may be due to its constant exposure to toxins and its need to detoxify the body. The article also touches on the idea that the body's design is not perfect and that evolution has made trade-offs between regeneration and cancer risk. The author suggests that the liver's regenerative abilities may come at the cost of increased cancer risk.

Main themes

  • human body limitations
  • liver regeneration
  • evolution and design
  • cancer risk
  • aging and mortality
  • modern medicine and technology
  • nutrition and energy intake
  • regeneration and maintenance
  • complexity of biological systems

What commenters say

  • The article's speculation on the human body's design and cancer risk is not supported by credible sources or qualifications.
  • Evolution does not aim to create perfect bodies, and aging and death are natural consequences of the body's unique arrangement of matter.
  • The human body is remarkably resilient and capable of healing itself, but it still requires maintenance and care to function optimally.
  • Modern medicine and technology have significantly improved human health and longevity, but people often take these advancements for granted.
  • The concept of 'average lifespan' is misleading, as it obscures the bimodal distribution of human mortality, with peaks in infancy and old age.
  • The human brain's energy-intensive nature may have been supported by the discovery of cooking and the increased availability of nutrients.
  • The trade-off between regeneration and cancer risk is a complex issue, and the liver's unique abilities may not be easily replicable in other organs.
  • The human body's limitations and vulnerabilities are a natural consequence of its evolution and design, and should not be seen as 'bugs' or flaws.