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Question

The main function of ___ is to take in oxygen and give out carbon dioxide.


  1. Digestive system

  2. Respiratory system

  3. Excretory system

  4. Reproductive system


Solution

The correct option is B

Respiratory system


The respiratory system includes the nose, pharynx, larynx, trachea, bronchi, and lungs. It brings oxygen to our bodies which is needed for our cells to live and function properly and it also helps to get rid of carbon dioxide which is a waste product of cellular function.

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