The Body Has Both Physical and Chemical ____________ to Prevent

Question

The body has both physical and chemical ____________ to prevent invaders from entering.
A)Cells
B)Barriers
C)Nodes
D)Cytes

Accepted Answer

The body has physical barriers, such as the skin and mucous membranes, which act as the first line of defense against invaders. These physical barriers prevent invaders from entering the body.