We all know that our bodies are specifically designed to live on Earth. We are so well adapted to the Earth’s environment that even the slightest change in this environment can wreak havoc on the body and disrupt the smooth functioning of its various organs. This disruption magnifies even more when astronauts move into outer space, where the environmental conditions are totally different from the Earth’s environment.
The moment an astronaut exits the Earth’s atmosphere, his body starts experiencing several changes due to the change in environment. The most important change, we all know, is microgravity. When on the Earth, the human body, as a whole, responds to the Earth’s normal conditions, and adjusts accordingly. On the other hand, when an astronaut enters space, his body starts responding to the normal conditions over there. While doing so, it starts experiencing certain mild to severe effects on their bodies, which have been discussed below. Take a look.
Astronauts who are on long-duration space missions with preexisting, but undetected, cardiovascular problems, are at a higher risk of developing complications in their condition.
Since the astronauts dwell in an environment that does not have a gravitational pull, and there is major change in cardiovascular functioning, fluid shift occurs in their bodies. In this situation, the blood that usually gets pulled towards the lower parts of the body, now shifts and gets redistributed upwards, towards the torso and the head. Due to this, astronauts often experience a puffy face and a feeling of congestion in their head. Also, a kind of disproportion can be experienced, wherein the legs are smaller than the head and the upper torso.