by Jarryd Hawkins
There are four blood components. The top layer is the plasma, the liquid layer that carries nutrients and hormones throughout the body, the middle layer is composed of white blood cells and platelets, and lastly the bottom layer is made up of red blood cells.
Platelets are cell fragments that assist in blood clotting.
Red Blood Cells
transports nutrients and carries oxygen and carbon dioxide.
White Blood Cells
fight diseases and foreign invaders