The bronchioles (/ ˈbrɑːŋkioʊls / BRONG-kee-ohls) are the smaller branches of the bronchial airways in the lower respiratory tract. They include the terminal bronchioles, and finally the respiratory bronchioles that mark the start of the respiratory zone delivering air to the gas exchanging units of the alveoli.

2024年8月2日 · Bronchioles are the smallest air passages inside the lungs. They branch off like tree limbs from the bronchi —the two main air passages that receive air from the trachea (windpipe) after being inhaled through the nose or mouth.

2024年3月27日 · Learn the fine structure of the lungs. The bronchioles are part of conducting zone of the respiratory system. The conducting zone allows air to travel from the trachea into the alveoli, where gaseous exchange occurs. The bronchioles start off as bronchi. The right and left main bronchi branch off from the trachea into the lungs.

2017年4月27日 · The bronchioles are tubes in the lungs which branch off from the larger bronchi that enter each lung, from the large and singular trachea which connects to the mouth.

A conducting airway which begins at the last cartilaginous plate and ends at the last ciliated epithelial cell; bronchioli are any of 7–9 increasingly finer subdivisions of the bronchiolar tree (BT), measuring < 1 mm in diameter.

2017年4月1日 · Located within the lungs, bronchioles are tubular structures around 1mm in diameter [4], consisting of connective tissues and some smooth muscles that keep the tubes open. These further divide into smaller tubules, which in …

2025年1月22日 · A bronchiole is a small airway in the respiratory system that branches off from the bronchi and leads to the alveoli, where gas exchange occurs. Unlike the larger bronchi, bronchioles lack cartilage and instead have smooth muscle to regulate airflow. These small airways are crucial in controlling the flow of air within the lungs.

Bronchioles are small, thin-walled air passages in the lungs that branch off from the larger bronchi and lead to the alveoli, where gas exchange occurs.

Bronchioles are behind the segmental bronchi in the branching hierarchy and further branch into terminal and respiratory bronchioles . During the branching of the bronchial tree , this "pipe" carrying air is simplified in its structure, and this is also …

2024年2月25日 · Bronchioles are small air passages in the lungs that branch off from the bronchi. They lead to tiny air sacs called alveoli. Bronchioles play a crucial role in the respiratory system by facilitating the exchange of oxygen and carbon dioxide in the lungs.