Surprising body changes in zero-G space environment

In space, the absence of gravity causes various changes in the human body. Astronauts can grow taller as their spines elongate, but this can lead to back pain. The heart becomes smaller and changes shape due to easier blood circulation. Bones lose calcium and become brittle, necessitating exercise to maintain bone density. Vision can be affected by changes in cranial pressure, requiring different prescriptions of glasses. Despite these challenges, the spirit of exploration makes these changes worthwhile.

What happens to the human spine in space due to the lack of gravity?

• It becomes shorter.

• It remains the same.

• It elongates, increasing height.

• It curves more.

Why does the heart change shape in space?

• It receives less oxygen.

• It is affected by radiation.

• It doesn't have to work as hard against gravity.

• It needs to pump more blood.

What happens to bones in space?

• They lose calcium and become brittle.

• They grow stronger.

• They gain more calcium.

• They become denser.

How does space travel affect vision?

• Eyesight becomes blurry due to dust.

• Intracranial pressure changes can alter vision.

• Vision remains unchanged.

• Vision improves significantly.

Why do astronauts keep different prescriptions of glasses on board?

• For reading purposes only.

• To protect against UV rays.

• In case their vision changes in space.

• To match their outfits.