Question

Fill in the blanks.

___________ membrane acts as a protective layer of gastrointestinal tract.

Answer 1

Innate immunity:

1. Immunity inherited by a child at the time of birth is called innate immunity.
2. It is naturally acquired by a person due to its genetic make-up.
3. It is categorized into two orders of self-defense mechanisms-first line of defense and second line of defense.
4. The first line of defense contains skin, tear glands, mucous membranes, saliva, etc.
5. Mucous membrane is the protective layer of the gastrointestinal, respiratory, and urinary tracts.

Hence, the mucous membrane acts as a protective layer of the gastrointestinal tract.