Blood is made up of a fluid called plasma. Plasma is 90% water, but has dissolved substances in it. The substances include blood proteins, like fibrinogen and prothrombin, which are needed for blood clotting. Others include carbohydrates, proteins, carbon dioxide, oxygen, metabolic substances, wastes, and salts like calcium and sodium.

There are 3 main blood vessels: arteries

Some common words found in the essay are:
, blood cells, red blood cells, red blood, white blood cells, blood heart, vena cava, white blood, carbon dioxide, inferior vena cava, blood cells leukocytes, carry blood heart, inferior vena, main blood, connect capillaries, cava brings,
Approximate Word count = 475
Approximate Pages = 2 (250 words per page double spaced)