Urine formation, animation
Videonummer 11937609
| Urine formation. Animation showing the structure of a nephron, the functional filtering unit of a kidney. The function of the kidney is to filter waste products such as urea from the blood. Filtrate leaves the blood in the renal corpuscle (upper left), where a glomerulus (bundle of capillaries, red) is encased in a Bowman's capsule. From here the filtrate passes into the renal tubule. In the first part of the tubule, the proximal convoluted tubule, salt (NaCl) is actively transported out, while water (H2O) diffuses out. The next part of the tubule, the descending limb of the loop of Henle, is impermeable to salt, but permeable to water. The ascending limb of the loop of Henle is permeable to salt, but not water. This establishes a salt gradient in the medulla of the kidney that aids the reabsorption of water. The filtrate moves on to the distal convoluted tubule and collecting duct, where more water is reabsorbed. The final product is urine. Original same as master. | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Biocosmos / Francis Leroy & Chris Lippens |
| Modell-Rechte: | nicht erforderlich |
| Länge: | 46 Sekunden |
| Seitenverhältnis: | 16:9 |
| Restrictions: | - |
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