| Kidney |
Artificial kidney |
| 1. It is a natural excretory organ in human beings to filter blood and forms urine. |
1. It is a device to remove nitrogenous waste products from the blood through dialysis. |
| 2. Kidney is used to filter blood in healthy persons. |
2. It is used in persons when both kidneys are damaged. |
| 3. Blood that passes through kidney contains nitrogenous wastes. |
3. Dialysing fluid used in dialysis machine do not contain nitrogenous wastes. |
| 4. Person’s blood passes through Malphigian body and renal tubule during filtration. |
4. Patient’s blood is passed through number of tubes with semipermeable lining suspended in a tank filled with dialysing fluid. |
| 5. Reabsorption of materials takes place in proximal convoluted tubule and distal convoluted tubule. |
5. No reabsorption of material takes place in artificial kidney. |
| 6. The filtration in the glomerulus is called pressure filtration or ultra filtration. |
6. The filtration in artificial kidney is known as haemodialysis. |
| 7. Anticoagulant heparin is present in the blood vessels. |
7. Heparin is added to the blood before pumping into the apparatus. |
(ADH) its permeability to water increases making urine concentrated.
