How do your kidneys remove waste from the blood?

Answer 1

he kidneys are the body's filtration system. The kidneys filter the blood of waste products such as urea, excess sugar, and excess water in individual functional units called nephrons. A pair of healthy kidneys contains a total of about 2 million nephrons. These nephrons filter about 500 gallons or 1900 liters of blood daily.

The way the nephrons filter blood is very complicated. In the structure called the glomerulus, almost everything except red blood cells and larger proteins is filtered into the proximal convoluted tubule. The glomerulus is the actual filter which sifts out all the wastes and the extra water and recycles the proteins and other healthy cells. The filtrate goes through a large network of tubules where most ions, water and proteins are reabsorbed into the blood, leaving only waste products and some water. The wastes and extra water are gotten rid of by being sent down the tubule in the form of urine and are stored in the bladder until urination.

More specifically, ultrafiltiration is the process by which fluid is filtered out of the blood by the glomerulus. The blood pressure in a glomerulus causes part of the blood plasma to leak through the capillary walls. The red blood cells and plasma proteins are too big to pass out of the capillary, so the fluid that does filter through is plasma without the protein. The fluid thus consists mainly of water with dissolved salts, glucose, urea and uric acid.

The kidney then uses selective reabsorption to take back into the blood the substances needed by the body. To accomplish sleective reabsorption, the filtrate from the glomerulus collects in the renal capsule and trickles down the renal tubule. As it does so, the capillaries which surround the tubule absorb the substance the body needs back into the blood. Glucose is reabsorbed with much of the water.Some of the salts are taken back to keep the correct concentration in the blood. Salts not needed by the body are left to pass down the kidney tubule with the urea and uric acid.

Answer 2

Function * Ultrafiltiration: the process by which fluid is filtered out of the blood by the glomerulus. * The blood pressure in a glomerulus causes part of the blood plasma to leak through the capillary walls. The red blood cells and plasma proteins are too big to pass out of the capillary, so the fluid that does filter through is plasma without the protein. The fluid thus consists mainly of water with dissolved salts, glucose, urea and uric acid. * Selective Reabsorption: the process of absorbing back the substances needed by the body. * The filtrate from the glomerulus collects in the renal capsule and trickles down the renal tubule. * As it does so, the capillaries which surround the tubule absorb the substance the body needs back into the blood. * ** The glucose is reabsorbed with much of the water. ** Some of the salts are taken back to keep the correct concentration in the blood. ** *** Salts not needed by the body are left to pass down the kidney tubule with the urea and uric acid. *** They continue down the renal tubule into the pelvis of the kidney, passes down the ureter and to the bladder. * Urine cannot escape from the bladder because a band of circular muscle, called a sphincter, is contracted, so shutting off the exit. When it relaxes, the muscular walls of the bladder expel the urine through the urethra. * ** Adults can control this sphincter muscle and relax it only when they want to urinate. ** In babies, the sphincter muscle relaxes by a reflex reaction, set of off by pressure in the bladder.

Answer 3

They work in a similar way to the filter paper in a coffee machine. They are porous enough to allow liquid and blood cells to pass through, but not enough to allow larger particles of waste back into the bloodstream.

Answer 4

The kidneys play an important part in the excretory system. Liquid passes through the kidneys and the waste is filtered out. The waste then forms a liquid called urine and passes to the bladder for removal.

Answer 5

The kidneys use a transport system called the counter-current mechanism. The name is based on the fact that concentration first increases in the direction of flow, then decreases as flow continues through the ascending parallel loop. The mechanism relies on the adjacent, parallel loops of Henle and vasa recta.

Answer 6

para maalis ang mga dumi sa katawan uminom ng arc

Answer 7

The kidneys receiver urea from the liver. The kidneys role is to deaminate the urea forming ammonia, uric acic, nitric acid and various other minerals which make up 60% of urine.

Answer 8

carbon dioxide

Answer 9

by filtration

Answer 10

intercorse