Concentrations of Solutions (Section)The average adult

Blood  5 liters of this liquid tissue in the body (1.5 gallons) o 8% of body weight  Temperature near 100 degrees F, higher than normal body temp, mechanism by which we change body temp o Increase- divert blood towards core o Decrease- divert more blood to the surface of our body and the blood is exchanged with the heat of the atmosphere o Mechanism of heat exchange  Functions o Delivers oxygen  Takes oxygen from the lungs to active cells- the electric acceptor to make ATP for energy and nutrients- to cells that need them o Transports metabolic wastes  Carries away waste from cells, most of the time CO2 o Transports hormones o Maintains body temperature o Maintains body pH  Blood contains buffers that will resist change to pH o Maintains fluid volume  Has components that prevent loss, clotting factors o Prevents infection  Components o Formed elements  Erythrocytes  Carry respiratory gases CO2 and oxygen  2 of the 5 liters of blood are RBC 45%  RBC no longer living cells, get rid of organelles now only a machine to carry oxygen  Leukocytes  WBC  5 different types all with unique functions  All true cells, have nuclei and cytoplas