How does the tissue of the kidneys structure to aid in filtration?

Answer 1

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.