It’s really true: space wants to kill us. And this time, space is trying to kill us from the inside out.
Upon entry into microgravity, body fluids tend to migrate away from the legs toward the upper body and head, with the usual result of nasal congestion, a feeling of fullness in the head and faces that look puffy. This fluid shift has also been part of the studies of why astronauts’ vision degrades while in space.
Instead, a team led by Dr. Guy Trudel from the Ottawa Hospital and University of Ottawa, found that the red blood cell destruction was a primary effect of being in space, not just caused by fluid shifts. Plus, the rate of red blood cell destruction persisted, albeit at a lower rate, for at least a year following the astronauts’ six-month expeditions in space.
Red blood cell destruction happens all the time in our bodies. On Earth, our bodies create and destroy 2 million red blood cells every second. The researchers found that astronauts’ bodies were destroying 54 percent more red blood cells during the six months they were in space, or 3 million every second. These results were the same for both female and male astronauts.
In this study, five out of 13 astronauts were clinically anemic when they landed—one of the 14 astronauts did not have blood drawn on landing. While the researchers found that the anemia slowly improved after a few months, even one year after astronauts returned to Earth, red blood cell destruction was still 30 percent above preflight levels.
Nancy_A Hehe ! It's not Space but it's the environment you breath in makes your immune system overreact.
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