Facts about Glomerulus

1. 08

   Capillary endothelial cells lining the glomerulus contain 70,000 to 100,000 fenestrations per cell, enabling rapid passage of water and small molecules while maintaining a selective barrier.

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2. 07

   Approximately 20 percent of cardiac output flows through the kidneys' glomeruli at any given moment, making them among the most highly perfused structures in the human body.

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3. 06

   Basement membrane in the glomerulus consists of three layers—the endothelial cell layer, the lamina densa, and the epithelial cell layer—with the lamina densa comprising approximately 300 nanometers of specialized collagen and proteoglycans.

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4. 05

   Mesangial cells within the glomerulus comprise approximately 30 to 40 percent of the total glomerular cellularity and contract in response to angiotensin II to regulate blood flow through the capillaries.

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5. 04

   Podocytes in the glomerulus are among the largest cells in the human body, with each cell extending foot-like processes that cover approximately 0.2 square millimeters of basement membrane surface area.

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6. 03

   Filtration slits between podocytes in the glomerulus measure approximately 6 to 10 nanometers wide, allowing water and small solutes to pass while blocking proteins larger than 60 to 70 kilodaltons.

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7. 02

   Each human kidney contains approximately 1 million glomeruli, and damage to just 10 percent of them can significantly impair kidney function and cause disease.

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8. 01

   The average human glomerulus filters approximately 180 liters of blood daily to produce 1 to 2 liters of urine.

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