👉 Tubules, also known as renal tubules, are a type of kidney cell that help to filter waste and excess substances from the blood. These cells are responsible for removing urea (a byproduct of protein metabolism) from the bloodstream into urine, which then is transported to the bladder where it is excreted. Tubules are also responsible for filtering out other substances such as salt and water, as well as for detoxifying substances like certain medications and drugs. They are also involved