It might sound strange, but air is lethal if it's in the wrong place.
Have you noticed that when a nurse is about to give someone an injection, they hold the syringe with the needle up and squirt out a small amount of the liquid, maybe tapping the syringe first. That's to make sure that there's absolutely no air in there.
If you get an air bubble in your blood system, it can actually stop the blood flow when it enters smaller blood vessels. If that's in your heart or brain, you're in big trouble.
Normally you don't need to be afraid for getting air into an open wound, since the blood pressure will make sure that blood leaks out instead of air gets in. But if you blow compressed air into a wound you could get bubbles in there.
Have you noticed that when a nurse is about to give someone an injection, they hold the syringe with the needle up and squirt out a small amount of the liquid, maybe tapping the syringe first. That's to make sure that there's absolutely no air in there.
If you get an air bubble in your blood system, it can actually stop the blood flow when it enters smaller blood vessels. If that's in your heart or brain, you're in big trouble.
Normally you don't need to be afraid for getting air into an open wound, since the blood pressure will make sure that blood leaks out instead of air gets in. But if you blow compressed air into a wound you could get bubbles in there.