The surface defenses of the body consist of the ________ and the mucous membranes lining the digestive and respiratory tracts.
A)bone marrow
B)skin
C)T cells
D)lymphocytes

Question

Quizplus · Accepted Answer

The surface defenses of the body refer to the physical barriers that prevent pathogens from entering the body. The skin is the first line of defense, providing a physical barrier to protect against microorganisms. Mucous membranes also provide a physical barrier, lining the digestive and respiratory tracts to prevent the entry of pathogens. Bone marrow, T cells, and lymphocytes are all components of the immune system, but they are not considered part of the surface defenses.

The Surface Defenses of the Body Consist of the ________