Answers:
(5) Capillaries surrounding tubules reabsorb water, salt, and sugar.
(1) Capillaries merge to form small veins.
(3) Blood enters kidneys through the renal artery.
(4) Excess liquid passes into tubules of nephron.
(6) Water, salt, sugar, and wastes pass into cup structure of nephron.
(7) Renal veins return purified blood to the rest of the body.
(2) Small veins merge to form renal veins.
