What happens to our bodies in outer space without astronaut uniforms?

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What happens to our bodies in outer space without astronaut uniforms? Many films show that the human body will explode if it does not use a special uniform in space but that is not true. The human body will bulge, maybe even reach its normal body size twice but not explode because human skin is still elastic enough to follow this change in shape. But the main problem is oxygen, humans have to breathe oxygen continuously to stay alive. The body will faint after 15 seconds of losing oxygen and the brain will completely stop working after 3 minutes of not receiving oxygen. Maybe you think of holding your breath for a few minutes like diving in a swimming pool. outer space is really a very unfriendly place for us humans. We must be grateful that we live on this beautiful earth, we should take care of it, not damage it