Parts of Blood
There are four parts of blood. Plasma, Platelets, Red Blood Cells, & White Blood Cells. Plasma is the liquid form in the blood. It carries nutrients & hormones throughout the body. Plasma makes up 55% of blood tissue. Platelets are cell fragments that assist in blood clotting. There are 300,000 of them per microliter of blood. Red Blood Cells are the cells that transport nutrients, also know as Erythrocytes. White Blood Cells fight off disease and are also known as Leukocytes.
How White Blood Cells Work