Multiple choice

The diaphragm assists in

  1. excretion of water

  2. circulation of blood

  3. digestion

  4. respiration
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The diaphragm assists in respiration. When the scalenes and external intercostals contract while the diaphragm descends, your lungs inhale air. When your abdominal muscles contract and the diaphragm rises, you exhale.

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