Caption: Kidney glomerulus (podocytes and capillaries of the renal corpuscle). The glomerulus consists of a tightly coiled network of capillaries surrounded by podocytes. There about 1 million glomeruli in each kidney. Podocytes have narrow cell extensions (processes) that in turn give rise to secondary extensions called pedicels. The podocytes completely surround the capillary system. As blood passes through each glomerulus, water and metabolic wastes are filtered through capillary walls by the surrounding podocytes. About 100 litres of blood are filtered every hour. The water and waste pass into the lumen of the Bowman's capsule. From the capsule the water and waste draiins into the surrounding tubules where reabsorption occurs.
Magnification*: x800
Type: SEM
Copyright 2000 Dennis Kunkel Microscopy, Inc.
Keywords: 20518D,kidney,glomerulus,glomeruli,podocyte,podocytes,capillary,medulla,renal corpuscle,pedicel,pedicels,blood filtration unit,urinary system,visceral epithelium,human body,SEM