1. Definitions of Key Bloodstain Pattern Analysis Terms
Blood Spatter Analysis Lab Activity

2. Categories of Blood Stains
Passive - formed due solely to the effect of gravity. 
These include:
drips
pools
clots (the last two being from venous bleeding)

3. Categories of blood stains
Transfer - similar to the way a stamp transfers ink from an inkpad onto another surface, and the ink stain takes the shape of the stamp, blood from a hand or shoe will leave behind that impression.

4. Categories of blood stains
Projected - due to a force, either within the body (internal - arterial spurts), or from outside the body (external - cast off), which is greater than the force of gravity, thus allowing the blood to travel in a path other than merely one due to gravity.

5. vocabulary
Useful terms for blood drop lab: 1. Target: the surface where the blood ends up

6. 2. Angle of impact: The angle at which a blood droplet strikes a surface

7. 3. Cast-Off Stains: Blood that has been thrown from a secondary object (weapon) onto a target other than the impact site.

8. 4. Drop patterns: characteristic patterns present when blood drips into standing, wet blood

9. 5. Origin: the point in space where the blood spatter came from

10. 6. Parent drop: the droplet from which the satellite spatter originated
7. Satellite spatters: small drops of blood that break off from the parent spatter when the parent droplet strikes a surface

11. 8. Projected blood: blood under pressure that strikes a target ex
8. Projected blood: blood under pressure that strikes a target ex. Arterial gushing or spurts

12. 9. spatter – bloodstains created from the application of force or energy to the area where the blood is
10. spines – the pointed edges of a stain that radiate out to form the spatter
11. splash – pattern created when a volume of blood in excess of 1ml. strikes a surface at a low to medium velocity

13. 12. swipe – the transfer of blood onto a surface by a bloody object that is usually moving laterally

14. 13. transfer pattern – the pattern created when a bloody object comes in contact with a target surface, leaving a pattern, that has the features of the object making it useful for identifying the object
14. wipe – pattern created when a secondary target moves through an existing wet blood stain on some other object