1.

(1 pt) Carbon dioxide is a waste product from breathing. Which organ of the body, which is attached to the trachea, pushes carbon dioxide out of the body?

A.
liver

B.
lungs

C.
kidney

D.
skin
2.

(1 pt) Which organ, located just below the diaphragm, turns waste materials from the blood into urea?

A.
liver

B.
lungs

C.
kidney

D.
skin
3.

(1 pt) Which organ releases salt and liquid waste from the body through its pores and glands?

A.
liver

B.
lungs

C.
kidney

D.
skin
4.

(1 pt) Which pair of organs, located in the lower back, collects liquid and waste from the blood?

A.
liver

B.
lungs

C.
kidneys

D.
skin