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

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