In the circulatory system of the human body, there are about 5-6 quarts of blood in the average adult. This blood is considered a tissue because it has many cells. The blood goes to all the parts of the body taking oxygen from the lungs and carbon dioxide to the lungs, while also transporting metabolic wastes and nutrients. Blood is made up of a fluid called plasma. Plasma is 90% water, but has dissolved substances in …showed first 75 words of 477 total…

…showed last 75 words of 477 total…