The text provides information about blood as the only fluid tissue in the human body, classified as a connective tissue. It carries nutrients, waste, and body heat through blood vessels. The components of blood include living cells (formed elements) and a non-living matrix (plasma). The composition of blood after centrifugation is described, with erythrocytes sinking to the bottom, the buffy coat containing leukocytes and platelets, and plasma rising to the top. The text also mentions that blood is heavier and thicker than water due to its formed elements.