Question

which body membrane surrounds organs located in body cavities that do not open directly to the outside of the body?
mucus
synovial
integumentary
serous

Explanation:

Mucus membranes line cavities that open to the outside. Synovial membranes are in joints. Integumentary is the skin system. Serous membranes line body cavities not open to the outside and cover organs within them.

Answer:

D. Serous