Question

Why does blood pump out of a cut on the human skin? blood flow decreases changing capillary permeability blood flow increases changing capillary permeability blood supply decreases as tissue damage causes a release of vasoactive/chemotactic factors blood supply increases as tissue damage causes a release of vasoactive/chemotactic factors?

Answer 1

Blood flows out of a cut so as to maintain the body pressure, this occurs because pressure inside the human body tends to be greater than the external environment pressure. Since blood flows from high pressure to low pressure, it thus runs off a cut