blood will not break into smaller droplets or spatters unless what is disrupted?

Blood will not break into smaller droplets or spatters unless its surface tension is disrupted. The surface tension of blood acts like an invisible outer skin that maintains the integrity of a blood drop. Forces such as gravity and air resistance alone are not sufficient to overcome this surface tension and cause blood to break apart into smaller droplets or spatters. Disruption of the surface tension can happen upon impact with a surface, especially if the surface is rough or irregular, which facilitates spattering by breaking the blood drop apart.