If You Were to Rub Your Finger Over the Surface

Multiple Choice

If you were to rub your finger over the surface of your face, you would notice that the skin is oily. What makes up the oil?

A) Waste material from cellular metabolism
B) Waste material (bilirubin) from dead red blood cells
C) Ruptured cells from sebaceous glands
D) Extracellular fluid not drained by the lymphatic system
E) Plasma leakage from damaged blood vessels