Scleroderma is not a single disease, but a set of related disorders involving a similar set of symptoms. This makes a concise definition â and diagnosis â difficult. All forms of scleroderma do, however, share the basic characteristics of fibrosis (an excessive accumulation of tissue) and inflammation.
Urea (NH2)2CO is a chemical that comes from the breakdown of proteins. It is the main source of Nitrogen in urine and is excreted by the body as a waste product from your kidn â¦ eys.   Urea is a readily available source of Nitrogen so is used as a fertilizer and sometimes as a supplement to feed for stock.  . 60 people found this useful.t is the main source of Nitrogen in urine and is excreted by the body as a waste product from your kidn â¦ eys.   Urea is a readily available source of Nitrogen so is used as a fertilizer and sometimes as a supplement to feed for stock.   . 60 people found this useful.
Urea is freely filtered, 50% are reabsorbed in the proximal tubule with the reabsorption of water (solvent drag). Urea is secreted in the thin ascending limb of Henle loop, so significant amounts of urea reach the distal nephron.ubular Reabsorption of Sodium, Chloride and Fluids. 99% of the glomerular filtrate volume (primary urine, 120 ml/min), 99% of the filtrated sodium and 99% of the filtered Chloride are reabsorbed in the renal tubules of the nephron.