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The Collaborative International Dictionary

Bronchus \Bron"chus\, n.; pl. Bronchi. [NL., fr. Gr. ? windpipe. Cf. Bronchia.] (Anat.) One of the subdivisions of the trachea or windpipe; esp. one of the two primary divisions.

Douglas Harper's Etymology Dictionary

1706 (plural bronchi), from Greek bronkhos "the wind pipe" (see bronchial).


n. Either of two airways, which are primary branches of the trachea, leading directly into the lungs.

  1. n. either of the two main branches of the trachea [syn: bronchial tube]

  2. [also: bronchi (pl)]


A bronchus, also known as a main or primary bronchus, is an airway in the respiratory tract that conducts air into the lungs. There is a right bronchus and a left bronchus and these bronchi branch into smaller secondary and tertiary bronchi which branch into smaller tubes, known as bronchioles. No gas exchange takes place in the bronchi.

Usage examples of "bronchus".

Bronchus, bronchia, bronchile, probing, and withdrawing at resistancesand there it was.

In the trachea, bronchi, and larger bronchial tubes, the stiffness is supplied by rings of cartilage, while in the smaller tubes this is replaced by connective and muscular tissue.

These convey to the lungs blood that has already been supplied with oxygen, passing it into the capillaries in the walls of the bronchi, bronchial tubes, and large blood vessels, as well as the connective tissue between the lobes of the lungs.

Demonstrate the trachea, bronchi, and the bronchial tubes, and the general arrangement of pulmonary arteries and veins.

Occasionally, the decision has to be deferred until an attempt is made to dissect out the bronchus, the artery and the two large veins which supply air and carry blood to and from the lung.

Hawkeye dissected the bronchus up to where- the trachea divides and applied a stapling device which saves sewing it by hand.

The wound was of such an extent as to communicate with a bronchus, and by this means the iodin entered the respiratory tract, causing suffocation.

Liston removed a large piece of bone from the right bronchus of a woman, and Houston tells of a case in which a molar tooth was lodged in a bronchus causing death on the eleventh day.

Warren mentions spontaneous expulsion of a horse-shoe nail from the bronchus of a boy of two and one-half years.

At the postmortem examination the nail was found near the bifurcation of the right bronchus, and, although colored black, was not corroded.

The internal canule of the tracheotomy-tube fell into the right bronchus, but was removed by an ingenious instrument extemporaneously devised from silver wire.

The cigarette was drawn into the right bronchus, where it remained for two months without causing symptoms or revealing its presence.

Increased difficulty of breathing is the result, and where a large portion of lung is affected by the plugging up of a large bronchus, a fatal result may rapidly follow, the danger being specially great in the case of children.

The parasympathetic nerve fibers, on the other hand, act to slow the heartbeat, contract the pupil of the eye and the bronchi of the lungs and stimulate the activity of the alimentary canal muscles.

Kugler recites the description of the case of an arrow-wound of the thorax, complicated by frightful dyspnea and blood in the pleural cavity and in the bronchi, with recovery.