eli5. How come you don’t continue to bleed from the hole in your vein after you get your blood drawn?

Question

eli5. How come you don’t continue to bleed from the hole in your vein after you get your blood drawn?

In: Biology

Answer 1

The reason why we don’t bleed to death from small holes such as injuries or blood draws, is because your blood has a bunch of little cell pieces called platelets. Whenever the body detects an injury, they clump together and plug up the hole.