Process of urine formation can be divided in to three sub processes. 1. Pressure Filtration Arterial blood comes to the glomerulus with pressure exerted by the pumping of blood by the heart. This blood while passing through glomerulus is filtered into Bowman's capsule. Blood is filtered here because walls of the glomerulus are porous, and the fraction of the blood pressure reaching here provides the filtration pressure. This filtrate collected in glomerulus is called as glomerular filtrate. Every thing which is smaller than the pores of the glomerulus is filtered out of the blood. Generally blood cells and plasma proteins are not filtered out whereas water and dissolved salts, sugar, medicines and nitrogenous wastes are filtered out of the glomerulus into the Bowmann's capsule. From here they enter the next part the renal tubule. As many useful substance such as glucose, amino acids, salts etc are still present in Bowmann's filtrate in aqueous...
Comments
Post a Comment