Final answer:
The type of tissue that lines the kidney tubules is simple cuboidal epithelium, which consists of a single layer of cube-shaped cells.
Step-by-step explanation:
Simple cuboidal epithelium consists of a single layer of cube-shaped cells with a central nucleus. It is involved in secretion and absorption and can be found in the walls of tubules, including the kidney tubules. An example of simple cuboidal epithelium can be seen in Figure 33.8, where these cells line the tubules in the mammalian kidney.