MICROANATOMY

Detailed explanation-1: -Because blood demonstrates surface tension, or cohesive forces that act like an outer skin, a drop of blood dropped at a 90° angle forms a near-perfect spherical shape.

Detailed explanation-2: -The spherical shape is caused by the surface tension of the blood. Surface Tension causes the blood drop to pull itself in; both horizontally and vertically. The blood drop will settle into a spherical shape, as a result of the surface tension.

Detailed explanation-3: -The molecules in blood are cohesive and maintain a round shape due to the surface tension that surrounds the liquid in other words as the parent drop falls it oscillates from a spherical to oblong and eventually takes on a perfectly spherical shape due to surface tension.

Detailed explanation-4: -Blood has a spherical shape due to the surface tension that binds the molecules together. Blood maintains this spherical shape until it hits a surface. The shape that blood takes when it contacts a surface depends on: the angle of impact.

Detailed explanation-5: -Blood travels in spherical drops because of surface tension, the tendency of liquids to minimize surface area because their molecules are attracted to one another. In other words, it’s cohesive [source: Rosina, et al].