1 It is composed of liquid plasma and formed elements. 2  Formed elements include: 3  Erythrocytes, or red blood cells (RBCs). 4  Leukocytes, or white blood cells (WBCs).
Vehicle Identification Numbers (VINs) Vehicle Identification Numbers are unique codes given to each on-road vehicle in the United States. From 1981, each new car is given a standardized 17-digit code, which includes a serial number. Older cars may have VINs too, although they will not follow the standardized formula.
Each VIN has blocks of digits, and each block is a code that represents information about the vehicle. The first three digits of this number represent the car manufacturer. If the manufacturer produces fewer than 500 cars, the number nine is used in the third digit. The next five digits stand for the attributes of a vehicle. These attributes include the car's model and body style. The ninth digit is a check digit that is used to determine a VIN's validity.