Which is incorrect about the description of renal structure?
选项：

A:Renal substance can be divided into renal cortex of surface layer and renal medulla of deep layer.;
B:The renal cortex can be divided into renal corpuscles and renal tubules.;
C:The renal medulla is constituted of 15 to 20 renal pyramids.;
D:The minor renal calices converge into major renal pelvis» then the latter converges and forms renal pelvis.;
E:The renal cortex has darker color than renal medulla.