Mucosa-associated lymphoid tissue (MALT) is located within the lining of -
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Respiratory, digestive and urogenital tracts
Option (1) Nervous and skeletal system — Incorrect. These systems lie deep inside the body and have no mucous lining open to the outside. Lymphoid tissue of this kind is not found in them.
Option (2) Endocrine and circulatory system — Incorrect. Blood carries lymphocytes round the body, but blood vessels and endocrine glands are not lined by mucosa. MALT is not located in them.
Option (3) Skin and muscle system — Incorrect. The skin is a physical barrier of the body. But neither skin nor muscle has a mucosal lining, so MALT does not lie in them.
Option (4) Respiratory, digestive and urogenital tracts — Correct. These tracts open to the outside, and most microbes enter the body through them. Their mucous lining therefore holds lymphoid tissue that meets the microbes as they enter.
NCERT Extract:
Immune System in the Body – …
