Kidney
The substance that is transported from the liver to the kidneys is urea. Urea is produced in the liver during the breakdown of proteins and is transported through the blood to the kidneys for excretion in the urine.
nitrogenous waste is carried through the blood. the waste passes into the nephrons (kidney cells) inside the nephrons the blood passes through "the loop of henly" in which the waste is pulled out of the blood and send to the bladder to be concentrated as urea
Blood transports oxygen, glucose, amino acids, fatty acids, carbon dioxide, urea, hormones, drugs and heat.
Urea enters the hepatic vein and then goes the the right and then left side of the heart. Then it enters the systemic circulation. 20 % of the cardiac out put goes to the small sized kidneys for excretion of the urea. With this much heavy blood supply to the kidneys, urea is eliminated from your body.
The liver produces urea when it metabolises (breaks down) proteins. This is done in hepatocytes (liver cells). Amino acids are first broken down into ammonia, which is highly soluble and toxic in the blood plasma, so ammonia is joined with carbon dioxide to make urea, this is less soluble and less toxic but a build up of urea is toxic in the blood. Urea is then transported in the blood to be filtered out by the kidneys.
What is the difference between urea and BUN
Your liver converts the nitrogenous waste into urea, which is then transported out of the body when you urinate.
The organ responsible for breaking down red blood cells and synthesizing urea is the liver. It processes hemoglobin from the degraded red blood cells to produce bilirubin and converts ammonia, a toxic byproduct of protein metabolism, into urea. The urea is then transported to the kidneys, where it is excreted from the body in urine. Thus, while the liver is primarily involved in these processes, the kidneys play a crucial role in excreting the resulting waste.
The Kidneys, where the blood/urea thing takes place.
Urea is one of the substances in urine, and urine is in your blood stream until the kidney extract the urine from your blood.
Urea is synthesised in the liver, from the oxidation of amino acids and/or ammonia. Look up "urea cycle" for details about this process. It is then transported (in the blood) to the kidneys and excreted to the bladder, and exits the body with the urine.
the blood plasma carries waste products, including urea.