What is lined with simple cuboids epithelium with numerous long dense micro-villi?

The structure lined with simple cuboidal epithelium and numerous long dense microvilli is typically the proximal convoluted tubule (PCT) of the nephron in the kidney. This specialized epithelium aids in the reabsorption of water, ions, and nutrients from the filtrate back into the bloodstream. The extensive microvilli increase the surface area, enhancing the efficiency of absorption.