Question

Which of the following forms the first line of defense of the body against pathogens?

• A. Skin
• B. Tears
• C. Mucus
• D. All of these

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Skin

B

Tears

C

Mucus

Skin, cilia in the windpipe, saliva and mucus form the first line of defense of the body against microbial invasion. These are called so because they are the first barriers which the pathogens encounter when they enter a body during an infection.