Up to 8% of our total body weight is blood. Plasma is a transportation system
for all of the other components. It is a clear liquid protein and salt solution that accounts for 55% of total blood
volume. Plasma contains blood clotting factors, sugars, lipids, vitamins, minerals, hormones, enzymes, antibodies and
many types of proteins.
cells transport oxygen from our lungs to all living tissues in the body and carry away carbon dioxide. Red blood cells, also
called erythrocytes, account for 40-50% of total blood volume. Oxygenated red cells give blood its red color.
White blood cells or leukocytes only account for
about 1% of total blood volume and perform many different and highly specialized functions with regard to our immune responses.
Platelets and thrombocytes clot our blood by adhering to blood vessel walls and also by releasing coagulating chemicals.