-If the feeble condition for a long time will make your muscles exert less than normal. Make lip muscles and the body's fluids move from the bottom to the upper body. Astronaut must exercise regularly to. Lip muscles does not occur. The system allows the blood pump is working, as well as when in the normal state
.-Conditions of pressure and high temperature External pressure lower blood pressure in the body, so much blood, and d. death. In addition, there are also high-temperature in space, and filled with various rays
.-In a feeble blood stream will flow from the legs up, the brain is more effective at causing larger neck size.
-The obstacles of the astronaut in the feeble condition is difficulty in daily use.
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