The respiratory tract contains cartilage in the trachea and bronchi to maintain their structure and prevent collapse. As the airways branch into smaller bronchioles (less than 1 mm in diameter), the cartilage rings disappear, and the walls become primarily smooth muscle and elastic tissue, which allows for regulation of airflow through bronchoconstriction and bronchodilation.
In which part or organ of human body cartilage is NOT found ?
Asked in UPSC NDA 2 2024 · Topic: Human Anatomy and Physiology (Skeletal System)
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