We don?t know why, but being in space causes us to destroy our blood
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Summary
However, Trudel noted that an estimated 85 percent of carbon monoxide produced by a human comes from hemolysis.The team’s results showed that in space, the astronauts’ bodies destroyed around 3 million red blood cells every second. This is 54 percent higher than what happens in human bodies on Earth, where the rate is 2 million every second.In space, the human body loses fluid, so even though an astronaut's body ends up with fewer red blood cells, the concentration stays at acceptable levels. According to the researcher, the longer astronauts stay in space, the longer space anemia will plague them on solid land.You must login or create an account to comment.Join the Ars Orbital Transmission mailing list to get weekly updates delivered to your inbox.
As said here by Doug Johnson