ANATOMY

Detailed explanation-1: -Bronchioles: The trachea divides into two main bronchi, the left, and the right, These bronchi divide into smaller microscopic tubes, known as bronchioles. The cilia lining the bronchi and bronchioles help to remove the small foreign particles.

Detailed explanation-2: -In your lungs, the main airways, called bronchi, branch off into smaller and smaller passageways. The smallest airways, called bronchioles, lead to tiny air sacs called alveoli.

Detailed explanation-3: -What Happens at the Lungs? The bronchi branch off into smaller bronchi and even smaller tubes called bronchioles (BRAHN-kee-olz). At the end of each bronchiole are tiny air sacs called alveoli. This is the place where the exchange of oxygen and carbon dioxide actually happens.

Detailed explanation-4: -It is important to note that the right main bronchus is wider, shorter, and more vertical than the left main bronchus, and it enters the right lung at roughly the level of the fifth thoracic vertebra.

Detailed explanation-5: -A decrease in diameter is called bronchoconstriction, which is the tightening of the smooth muscle surrounding the bronchi and bronchioles due to and stimulated by histamine, parasympathetic nerves, cold air, chemical irritants, excess mucus production, viral infections, and other factors to decrease air flow.