“You’ve gone and done it. You’ve found yourself “spaced”: tossed out of the airlock of a capsule or space station without a spacesuit. Panicking, you desperately try to get yourself back to safety. How long do you have to find a source of both air and air pressure?
Spoiler alert: not long. Twist ending: longer than you think.
First off, you’re not going to explode, and your blood’s not going to boil. Just because there’s zero pressure outside doesn’t mean that your body suddenly loses all cohesion.”
There’s more. While you still can, you should go to space.com to learn the details.