Which of the following statements about the uterus is WRONG?
选项：

A: The uterus is divided into 2 main portions, the body and the cervix , connected by the isthmus. ;
B:The ligaments supporting the uterus consist of the uterosacral ligaments, the cardinal ligaments, the round ligaments and the broad ligaments. ;
C:The blood supply to the uterus is only from the uterine arteries. ;
D:The wall of the uterus consists of 3 layers: serous, muscular, and mucous.