MICROANATOMY

Detailed explanation-1: -The texture of the target surface upon which a drop of blood falls affects the size and shape of the bloodstain pattern. Hard, nonporous surfaces will produce circular stain patterns that have smooth edges, but softer, porous surfaces will produce spatter stains that are scalloped or have rough edges.

Detailed explanation-2: -When a droplet of blood strikes a surface perpendicular (90 degrees) the resulting bloodstain will be circular. Blood that strikes a surface at an angle less than 90 degrees will be elongated or have a tear drop shape.

Detailed explanation-3: -Bloodstain patterns One of the first ways in which BPA assists during reconstruction activities is through determining what type of bloodstain pattern is present. In general, these patterns can be divided into three different categories including passive drop, spatter, and special bloodstain configuration patterns.

Detailed explanation-4: -What are conditions affecting the shape of a blood droplet? Size of the droplet, angle of impact, velocity at which the blood droplet left its origin, height, texture of the target surface.