Skin, body hair, cilia, eyelashes, the respiratory tract and the gastrointestinal tract are examples of ________.
A.Physical barrier
B.Cellular barriers
C.Cytokine barriers
D.Physiological barriers
Answer:A
Skin, body hair, cilia, eyelashes, the respiratory tract and the gastrointestinal tract are examples of ________.
A.Physical barrier B.Cellular barriers C.Cytokine barriers D.Physiological barriers