Final answer:
The kidneys measure about 11-14 cm in length, 6 cm wide, and 4 cm thick, making none of the options in the question correct. They are protected by the eleventh and twelfth ribs and surrounded by layers of fat and the renal fascia.
Step-by-step explanation:
The dimensions of the kidneys are about 11-14 cm in length, 6 cm wide, and 4 cm thick. These measurements approximate the size of the kidneys rather than areas of distribution like "superior," "inferior," "lateral," or "medial." Therefore, none of the options provided in the question correctly describe the dimensions of the kidneys. It's also important to note that the kidneys are located retroperitoneally, well protected by the eleventh and twelfth ribs and layers of fat like the perirenal and pararenal fat as well as the renal fascia. Additionally, the kidneys are well vascularized, receiving a significant portion of cardiac output.