Which of the Following is NOT Part of the Body's

Question

Which of the following is NOT part of the body's first line of defense against microbial attack?
A) Phagocytes
B) Skin
C) Mucus
D) Stomach acid
E) Lysozyme

Accepted Answer

Phagocytes are part of the body's second line of defense, which involves internal mechanisms like the immune response, whereas the skin, mucus, stomach acid, and lysozyme are part of the first line of defense, providing physical and chemical barriers to prevent microbial entry.