Does human blood have proteases and nucleases ?

Answer 1

As it circulates, I don't believe there are many proteases active in blood. I'm pretty sure that there are a number of protease inhibitors in blood. However, when blood is put into a glass tube or when there is tissue damage, proteases are activated that allow blood to clot. Those proteins are in blood in the form of inactive precursors called zymogens.

I would guess that there are nucleases in blood, probably both ribonucleases and deoxyribonucleases.

Answer 2

yes when people have a heart attack they are released into the blood and indicate to the doctor you have had a heart injury-attack or stroke.