The functional units of kidneys where blood is filtered and urine produced are called the functional units of kidneys where blood is filtered and urine produced are called calyces. pyramids. lobes. nephrons. lobules.

The correct answer is nephron.

The nephron consists of Bowman’s capsule ( where blood is initially filtered ) and glomerulus which is a tuft of capillaries. Bowman’s capsule and a glomerulus together form the renal corpuscle. The renal tubule extends from the capsule and it consists of proximal convoluted tubule (selective reabsorption), a loop of Henle (establishes a salt gradient) and distal convoluted tubule (selective reabsorption). 

No 1 very mooch