Question

What are the tiny, tube-shaped structures found inside a kidney called?

Answer 1

nephrons

There are many blood vessels in the kidneys   Figure above  . The kidneys remove urea and other wastes from the blood through tiny filtering units called nephrons. Nephrons   Figure below   are tiny, tube-shaped structures found inside each kidney. Each kidney has up to a million nephrons. Each nephron collects a small amount of fluid and waste from a small group of capillaries.