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an anatomic structure with branches resembling a tree.
bronchial tree the bronchi and their branching structures; see color plates.
tracheobronchial tree the trachea, bronchi, and their branching structures; see color plates.
an anatomical complex of the trachea and bronchi. The bronchi branch from the trachea. The right bronchus is wider and shorter than the left bronchus and branches into three secondary bronchi, one passing to each of the three lobes of the right lung. The left bronchus is smaller in diameter and about twice as long as the right bronchus. It is also more horizontal and more susceptible to obstruction. It branches into the secondary bronchi for the inferior and the superior lobes of the left lung. The bronchus is sometimes described as a bronchial tube.
bronchial treeThe bronchi and their branching bronchioles. The trachea divides into two mainstem (primary) bronchi at the level of the sternal angle at the point of the carina, an acutely angled anatomical landmark; the right mainstem bronchus divides into two lobar (secondary) bronchi, and the left mainstem bronchus divides into three lobar bronchi; these in turn divide into segmental (tertiary) bronchi, quaternary, quinary, etc.
bronchial treethe air passages leading from the trachea to the lung alveoli, via a left and a right main bronchus, the branches from these to the lobes of the lungs, and within the lungs the progressively smaller bronchioles, terminal bronchioles (∼0.2 mm diameter) and finally the respiratory bronchioles which open into the alveolar ducts and the alveoli. All branches except the final, smallest ones have circular smooth muscle in their walls, which can change the diameter, varying the resistance to airflow. Cartilage stiffens the walls down to the bronchioles, forming complete rings in the trachea, becoming less complete in the bronchi and their branches. See also airway(s), Figure 1.
bronchial treerespiratory tract (trachea, bronchi, bronchioles and alveoli)
pertaining to or affecting one or more bronchi.
a hard concretion formed in a bronchus by accretion about an inorganic nucleus or from calcified portions of lung tissue or adjacent lymph nodes.
mucosal edema occurs in response to irritation and inflammation of tracheobronchial epithelium. Contributes to increased airway resistance.
feline bronchial asthma
a syndrome in cats characterized by acute episodes of coughing and dyspnea with wheezing. Usually recurrent and believed to be due to allergic reaction. Similar to allergic asthma in humans.
swollen spongy tissue or cystic, lobulated tissue replaces lobes of normal lung tissue because of the impediment to air flow caused by dilated or collapsed hypoplastic bronchi; probably the basic defect in adenomatoid hamartoma or congenital adenomatoid malformation.
bronchi become more prominent in x-rays because they become more dense than surrounding air-filled lung tissue. Caused by peribronchial infiltration, fluid within the bronchus and calcification of the bronchial cartilage. Seen in chronic bronchitis and bronchiectasis.
are the sounds made by the respired air as it passes through the larger air passages of normal lungs. They are best heard over the bifurcation of the trachea. They are harsher and louder than the vesicular murmur, the normal sounds produced in the parenchyma of the lung.
the bronchi and their branching subdivisions.
see pulmonary neoplasm.
1. an anatomical structure with branches resembling a tree.
2. in information science, a decision tree.
the trachea, bronchi and successive branching generations of the respiratory passages.
see decision tree.
see decision tree.
primitive arboreal mammal that some taxonomists place with the primates. Like squirrels in shape and size. Called also Tupaia spp.
a number of colubrid snakes that lead an arboreal existence and practice falling from trees with their body spread out, earning the name of flying snake.
the trachea, bronchi and their branching structures.
cycasarmstrongii, C. media.