This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
[{'content': 'Kidney cortex contains: \nSelect and explain. \nA. Loop of henle, B. Pyramids, C. Collecting tubule and duct, D. Calyces', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C Collecting tubule and ductRef: BDC, 6th ed. vol. II pg. 315-16* The kidney consists of an outer renal cortex and an inner renal medulla that contains the renal pyramids which drain into - Calyx - Pelvis.* Cortex forms a continuous smooth outer zone with a number of projections (cortical columns) that extend down between the pyramids.* It contains the renal corpuscles and the renal tubules except for parts of the loop of Henle which descend into the renal medulla. It also contains blood vessels and cortical collecting ducts.* The renal cortex is the part of the kidney where ultrafiltration occurs.', 'role': 'assistant'}]