Question
The kidney has ____ capillary beds in series. They connect the arteries to the veins inside the nephron.
Answer
The kidney has two capillary beds in series. They connect the arteries to the veins inside the nephron.
The two capillary beds are the glomerular and peritubular capillaries.
Note: There are two other instances in the human body of capillary beds in series: the hepatic and the hypophyseal portal venous systems. The kidney is unique because there is an arteriole between these, but it is still one of three portal systems in the body.
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