Answer:
Functional unit of kidney is nephron.
Step-by-step explanation:
Nephron is the main functional unit of the kidney which helps in removing waste substances from the body. It consist of afferent arterioles and efferent arterioles , bowmans's capsule, glomerulus, proximal convoluted tubules , loop of henle, distal convoluted tubule and collecting duct. It regulates the concentration of other soluble substances like sodium and water concentration in the body and excrete the excess fluid and waste in the form of urine.