American Academy of Professional Coders (AAPC) Practice Exam

What does the cutaneous membrane form in the body?

1. The outer covering of the body

2. Internal organ linings

3. Nerve sheaths for peripheral nerves

4. Structural joints between bones

The correct answer is: The outer covering of the body

The cutaneous membrane, commonly known as the skin, serves as the outer covering of the body. It is composed of two primary layers: the epidermis, which is the outer layer that provides a protective barrier, and the dermis, which supports the epidermis and contains blood vessels, nerve endings, and connective tissue. This membrane plays a crucial role in protecting internal organs from physical damage, pathogens, and dehydration, while also regulating temperature and facilitating sensory perception through various receptors. In contrast to the function of the cutaneous membrane, internal organ linings are formed by mucous membranes, nerve sheaths are composed of connective tissues that insulate and protect nerves, and structural joints between bones are formed by the articular cartilage and other connective tissue structures that allow for movement and stability in the skeletal system.