Blood anatomy
by Jacob Johnson-Grubaugh
Four parts of blood
There are four parts to blood. They layer on top of each-other because of density. the order goes Plasma, the Buffy coat or white blood cells, platelets, and red blood cells.
Plasma
Plasma is the liquid part of blood that carries nutrients and hormones throughout the body.
White blood cells
There are 5,000 to 10,000 WBC per microliter of blood. they make the middle layer of blood. they also are part of the immune system.
Platelets
Platelets are cell fragments that assist in blood clotting. There are 300,000 of them per micro liter of blood.
Red Blood cells
There are 5 million RBC per microliter of blood. they transport nutrients and it only lives a short period of time. they live for four months. they do not have a nucleus.