Albumins are water-soluble proteins which enter into the composition of all the tissues of the body. Albumins are generally divided according to their source of origin, as muscle-albumin, milk-albumin, blood- or serum-albumin, egg-albumin, vegetable-albumin, etc. These diﬀer both in chemical reactions and also physiologically. Serum-albumin occurs in blood PLASMA where it is important in maintaining plasma volume.
When taken into the stomach, all albumins are converted into a soluble form by the process of DIGESTION and then absorbed into the blood, whence they go to build up the tissues. Albumin is synthesised in the liver, and in chronic liver disease this process is seriously aﬀected. (See PROTEINURIA; KIDNEYS, DISEASES OF – Glomerulonephritis.)