Question

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?
waste material from cellular metabolism
waste material (bilirubin) from dead red blood cells
ruptured cells from sebaceous glands
extracellular fluid not drained by the lymphatic system
plasma leakage from damaged blood vessels
question 12
the epithelial linings of the respiratory and digestive systems develop from the
ectoderm.
endoderm.
mesoderm.
lumenoderm.

Explanation:

For the first question, sebum, the oily - substance on the skin, is produced by sebaceous glands and consists of ruptured cells from these glands. For the second question, the endoderm gives rise to the epithelial linings of the respiratory and digestive systems during embryonic development.

Answer:

Question 1: Ruptured cells from sebaceous glands
Question 2: endoderm