Knowledge gained during Henry Hudson's four voyages significantly expanded on that from previous explorations made in the 16th century by Giovanni da Verrazano of Italy, John Davis of England and Willem Barents of Holland.
You are really asking three questions; Your brain begins to die after 4-6 minutes without oxygenated blood being delivered to it. If your blood is flowing out from a wound that causes a few things to happen...less blood is delivered to organs, therefore less oxygen and eventually you will bleed out and that's it.
What causes loss of brain cells? I do know, for a fact, that the moment we reach the age of 18, that's when we start losing 50,000 brain cells a day.What else causes brain cell loss? do know, for a fact, that the moment we reach the age of 18, that's when we start losing 50,000 brain cells a day. What else causes brain cell loss?