GENERAL HISTOLOGY

Detailed explanation-1: -[2] Together, these two structures form the tracheobronchial tree of the lungs. The trachea is the trunk of the tree located in the superior mediastinum. The bronchi are the branches of the tree within the lungs. Both the trachea and bronchi form part of the conducting zone of the respiratory system.

Detailed explanation-2: -From the windpipe, air moves into the lungs through tubes called bronchi. The bronchi lead to smaller tubes called bronchioles, which look like the branches of a tree.

Detailed explanation-3: -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-4: -As the bronchi get smaller there is less cartilage and more smooth muscle until reaching the tertiary bronchi that consists entirely of smooth muscle. The smooth muscle can constrict the bronchi and impede air passage. The bronchi continue to branch and form small bronchioles which divide to form terminal bronchioles.

Detailed explanation-5: -The bronchial tubes, which branch into smaller tubes called bronchioles, are sometimes referred to as bronchi or airways.