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Question
The narrowest and most numerous tubes of lungs are termed as
The narrowest and most numerous tubes of lungs are termed as
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Solution
The correct option is C Bronchioles
The bronchus is a passage of airway in the respiratory tract that conducts air into lungs. These bronchi branch into smaller secondary and tertiary bronchi.
Hilum is a depression or fissure where structures such as blood vessels and nerves enter an organ. Alveoli are tiny air sacs within lungs where the exchange of oxygen and carbon dioxide takes place. The bronchioles are the passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lung, in which branches no longer contain cartilage or glands in the submucosa. They are narrowest branches of bronchi, and are part of the conducting zone of the respiratory system. They are numerous.
Therefore, the correct answer is option C.
The bronchus is a passage of airway in the respiratory tract that conducts air into lungs. These bronchi branch into smaller secondary and tertiary bronchi.
Hilum is a depression or fissure where structures such as blood vessels and nerves enter an organ. Alveoli are tiny air sacs within lungs where the exchange of oxygen and carbon dioxide takes place. The bronchioles are the passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lung, in which branches no longer contain cartilage or glands in the submucosa. They are narrowest branches of bronchi, and are part of the conducting zone of the respiratory system. They are numerous.
Therefore, the correct answer is option C.
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