Question

each kidney has about millions of tiny filters called?
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Answer 1

Answer:

The kidneys remove urea from the blood through tiny filtering units called nephrons. Each nephron consists of a ball formed of small blood capillaries, called a glomerulus, and a small tube called a renal tubule

Explanation:

hope it may helps...

Answer 2

Answer:

nephron

these are millions in kidney

these are structural and functional units of kidney's