Afferent arterioles bring blood from the body into the glomerulus of the kidney to be filtered.
The glomerulus is a cluster of capillaries that are derived from afferent arterioles and perform the first filtration of blood. Here, waste products are filtered from the blood.
The glomerulus is a cluster of capillaries leading to the nephron. It is the first site of filtration in the kidney.
Fenestrations are pores in the endothelial cells of glomeruli that allow for smaller substances to be filtered, but prevent red blood cells from leaving the blood.
Glucose, amino acids, salts, and urea are pushed by high pressure into the filtrate that enters the nephron. This process is called ultrafiltration.
Bowman's capsule is the site of ultrafiltration, and serves as the border between blood and filtrate. It surrounds the glomerulus so that all the blood passing through the capillaries can be filtered.
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