 Welcome to this activity, surface tension of a blood drop. As blood trickles downward from a finger, the blood drop grows or accumulates and forms a single drop. A single drop breaks free, briefly forming a tear drop shape. Surface tension pulls the blood drop together vertically and horizontally. The blood drop forms into a spheroid and remains in that shape until it impacts a surface. In this example, a drop of blood falls from a wrench. As blood trickles downward from the surface, the blood drop grows or accumulates and forms a single drop. A single drop breaks free, briefly forming a tear drop shape. The surface tension pulls the blood drop together vertically and horizontally. The blood drop forms into a spheroid and remains in that shape until it impacts a surface. We have completed this activity, surface tension of a blood drop.