Albumin and globulin are the two major proteins found in the blood. Albumin is produced in the liver and is important for transporting many molecules in the blood and making sure that the blood does not leak into the tissues of the body.lbumin and globulin are the two major proteins found in the blood. Albumin is produced in the liver and is important for transporting many molecules in the blood and making sure that the blood does not leak into the tissues of the body.
The arterioles then divide further into capillaries. Capillaries are the smallest blood vessels and their walls are only one cell thick which allows diffusion between the blood and cells to occur. Nutrients and oxygen from the blood diffuses through the capillary walls into the tissues that need it. This is aided by the relatively high blood pressure that also squeezes the oxygen and nutrients through the capillary wall and into the cells of the tissue. At the same time carbon dioxide and other waste products re-enter the capillary in order to be processed and removed from the body.
C. THE ROLE OF BLOOD IN EXCRETION. The wastes of excretion leave body cells and are secreted into intercellular fluid. Wastes pass from intercellular fluid into the blood plasma by the process of diffusion. The blood plasma transports these excretions to excretory organs that remove them from the body.he wastes of excretion leave body cells and are secreted into intercellular fluid. Wastes pass from intercellular fluid into the blood plasma by the process of diffusion. The blood plasma transports these excretions to excretory organs that remove them from the body.