What is the main function of our respiratory system?

What is the main function of our respiratory system?
  1. To provide energy to cells
  2. To produce carbon dioxide
  3. To transport oxygen to cells and remove carbon dioxide
  4. To estimate air volume in inspiration and expiration

Solution

Our respiratory system, comprising two lungs and associated air passages, has evolved to perform the function of transporting oxygen to the cells and removing carbon dioxide from there.

Asked in: NCERT

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