Astronauts collect blood from crewmates aboard the ISS— Here’s why

How Zero Gravity Affects Blood and Health. (Image: NASA)

Inside a lab floating 250 miles above our heads, astronauts continue to unravel how space changes the human body. Their mission isn't just science fiction—it's vital research for future space explorers and life back on Earth.

It's Not Simple Collecting Blood in Zero Gravity

Commander Takuya Onishi of JAXA and NASA's Nichole Ayers recently participated in a fascinating experiment on the International Space Station. The duo carefully collected blood samples from crewmates while floating around in weightlessness. Even mundane procedures like extracting blood get complicated, as instruments and tubes float free without gravity to keep them in line. All must be taped down or clutched in place while doing it.

Learning About How Space Influences the Immune System

The blood tests are among the Immunity Assay study. The project targets the impact of space on the body's cells and immune power. Researchers think microgravity, radiation and disrupted sleep can compromise the body's natural defences. These modifications might predispose astronauts to be ill during or after flight. By analysing the blood, scientists can detect markers for cell stress or impaired immunity.

Shaping Future Space Healthcare

The information gathered allows physicians to keep better tabs on astronaut health. If issues are identified early, medical teams can make care adjustments in a hurry. These findings also set the stage for safer spaceflight on upcoming missions. What the astronauts discover today may safeguard crews travelling to the Moon, Mars, or beyond.