Human excretory system

1) Label the parts of the system correctly.

.....i) A: Kidney （肾脏）

.....ii) B: Ureter （尿管）

.....iii) C: Baldder （膀胱）

.....iv) D:Urethra （尿道）

2) What is the function of the excretory system of human?
.....To get rid the waste products that are not wanted by the human body.

3) What will happen if a person does not defecate?

.....The person will fail sick easily.