Multiple choice

Which among the following can be excluded from the functions of the lungs?

  1. The lungs serve as a reservoir of blood in the body.

  2. They form defence system against air-borne infection.

  3. They filter small blood clots formed in arteries.

  4. They maintain sterility of the body.

  5. They secrete immunoglobulin A.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lungs filter gas micro-bubbles occurring in the venous blood stream such as those created during decompression after underwater diving. They also filter out small blood clots formed in veins.

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