In which part or organ of human body cartilage is NOT found ?

In which part or organ of human body cartilage is NOT found ?

Nose
Trachea
Bronchiole
Knee joint
This question was previously asked in
UPSC NDA-2 – 2024
Cartilage is a flexible connective tissue found in various parts of the body. While present in the nose, trachea, and knee joints, it is absent in the smaller airways called bronchioles.
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.
Cartilage provides support and flexibility. Different types of cartilage exist, such as hyaline cartilage (found in the trachea and joints), elastic cartilage (found in the ear and epiglottis), and fibrocartilage (found in intervertebral discs and menisci of the knee). The absence of cartilage in bronchioles is a key anatomical feature distinguishing them from larger airways.
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