How does microgravity affect us?

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Discussion Overview

The discussion centers on the effects of microgravity on human physiology, specifically focusing on the cardiovascular system and heart functioning. Participants explore various physiological changes that occur in microgravity, including impacts on bones and muscles.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant inquires about the specific effects of microgravity on the cardiovascular system and heart functioning.
  • Another participant notes that microgravity leads to weakening of bones, highlighting a serious concern for astronauts.
  • A third participant mentions ongoing studies on the International Space Station, indicating that muscle weakening occurs due to lack of use, which may be reversible.
  • A follow-up question seeks clarification on how microgravity affects heart functioning specifically.
  • One participant speculates that the heart muscles may weaken due to reduced effort in pumping blood, suggesting potential difficulties for astronauts returning to Earth.

Areas of Agreement / Disagreement

Participants express multiple competing views regarding the effects of microgravity on different aspects of human physiology, particularly the cardiovascular system. The discussion remains unresolved with no consensus reached.

Contextual Notes

Some claims depend on ongoing research and may not be fully substantiated. The discussion includes assumptions about the reversibility of muscle weakening and the specific mechanisms affecting heart functioning.

abes137
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How does microgravity affect us, in paricular our cardiovascualar system and heart functioning?
 
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One well known effect is that under microgravity, bones start to weaken.
 
The effects of microgravity on human physiology is one of the things being studied on the International Space Station. I'd have to check around to see what the latest data area, but as Monique said, there is a loss of bone mass (very serious concern). Also, muscles weaken from lack of use (something which can be fixed).
 
How does microgravity affect functioning of our heart?
 
Based on Phobos' reply, I would assume that the muscles in the heart would also become weakened due to the reduced effort required to pump blood around the body.. so a returning pilot may have difficulties once back on earth.
 

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