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What are the functions of cartilage and smooth muscle in the respiratory passages? What is the...

  1. What are the functions of cartilage and smooth muscle in the respiratory passages? What is the pattern of how much of each is present as air travels deeper and deeper toward the alveoli?
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The main functions of smooth muscles in the respiratory tract is the contraction and dilation of the bronchioles and the lungs that helps in the inhalation and the exhalation of air during the respiration. In case of vigorous exercise when more air is needed the smooth muscles dilate as the air flows deeper in to the lungs in to the alveoli that helps in the gaseous exchange as the muscles get the necessary oxygen.

The C shaped cartlages are present around the trachea., The main functions of these structures is to support the trachea that helps it from not collapsing. The larynx aslo consist of cartilages they are 3 paired namely epiglottic, thyroid and cricoid and 3 unpaired namely arteynoid, corniculate and cuneiform they help during the swallowing so that the food enters the food pipe rather than entering the wind pipe.

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