Youâre leaving work and see your coworker struggling to start their car. You go over to find out their batteryâs dead and offer to give it a jump. Before pulling out those jumper cables and connecting batteries, you should: a) Pull your running car up to theirs and leave the car running.
There are 8 different blood types (A+, A-, B+, B-, O+, O-, AB+, AB-). The most well known and medically important blood types are in the ABO group. Even though type AB is the rarest blood type, type AB plasma can help people with any blood type. 2  So, more type AB plasma donors are always needed. 3  By giving plasma regularly you can help people with AB, O, B and A blood types.
Human blood actually contains three different classes of cells: red blood cells for carrying oxygen, five types of white blood cells for fighting infection and platelet cells for wound clotting. As such, each type of cell has its own lifespan, from a few hours to several decades.