Question

multiple choice question
the membrane that is found lining the walls of organs and tubes that open to the external environment is a

cutaneous membrane
serous membrane
mucous membrane

Explanation:

Mucous membranes line the walls of organs and tubes that open to the external environment like the respiratory, digestive, and urinary tracts. Cutaneous membrane is skin. Serous membranes line internal body cavities not opening to the exterior.

Answer:

C. mucous membrane