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  • alveolus: (pl. alveoli) an anatomical structure found in the mammalian lung that has the form of a hollow cavity and is the primary site of gas exchange
  • bronchiole: branches of the bronchi
  • bronchus: (pl. bronchi) airway in the respiratory tract that carries air into the lungs, branches off from trachea
  • capillary: smallest blood vessel, allows exchange of gases, water, and other nutrient and waste chemicals between blood and the surrounding tissue
  • diaphragm: sheet of muscle extending across the bottom of the rib cage, separates the thoracic cavity from the abdominal cavity and assists in respiration
  • epiglottis:
  • glottis:
  • intercostal muscles:
  • larynx:
  • lung:
  • medulla oblongata:
  • pharynx:
  • thoracic cavity:
  • trachea: