- 1: Nasal cavity; filters, warms, and moistens incoming air.
- 2: Pharynx; serves as a passageway for both air and food.
- 3: Larynx; houses the vocal cords and prevents food from entering the trachea.
- 4: Trachea; conducts air to and from the lungs.
- 5: Bronchi; branch from the trachea to deliver air to each lung.
- 6: Diaphragm; contracts and relaxes to facilitate breathing.
- 7: Oral cavity; allows for air intake and is involved in speech and digestion.
- 8: Esophagus; transports food to the stomach (not part of the respiratory system).
- 9: Lung; site of gas exchange between air and blood.
- 10: Bronchioles; smaller branches of bronchi that lead to alveoli.
- 11: Alveoli; tiny air sacs where oxygen and carbon dioxide are exchanged.
Parent Tip: Review the logic above to help your child master the concept of the respiratory system worksheet fill in the blanks answers.
