respiratory tract

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a longitudinal assemblage of tissues or organs, especially a number of anatomic structures arranged in series and serving a common function, such as the gastrointestinal or urinary tract; also used in reference to a bundle (or fasciculus) of nerve fibers having a common origin, function, and termination within the central nervous system.
alimentary tract alimentary canal.
biliary tract the organs, ducts, and other structures that participate in secretion (the liver), storage (the gallbladder), and delivery (hepatic and bile ducts) of bile into the duodenum. See illustration.
Anatomy of the gallbladder and biliary tract. From Aspinall and Taylor-Robinson, 2002.
corticospinal t's two groups of nerve fibers (the anterior and lateral corticospinal tracts) that originate in the cerebral cortex and run through the spinal cord.
digestive tract alimentary canal.
dorsolateral tract a group of nerve fibers in the lateral funiculus of the spinal cord dorsal to the posterior column.
extrapyramidal tract extrapyramidal system.
gastrointestinal tract the stomach and intestine in continuity; see also digestive system.
iliotibial tract a thickened longitudinal band of fascia lata extending from the tensor muscle downward to the lateral condyle of the tibia.
intestinal tract see intestinal tract.
optic tract the nerve tract proceeding backward from the optic chiasm, around the cerebral peduncle, and dividing into a lateral and medial root, which end in the superior colliculus and lateral geniculate body, respectively.
pyramidal t's collections of motor nerve fibers arising in the brain and passing down through the spinal cord to motor cells in the anterior horns.
respiratory tract respiratory system.
urinary tract the organs and passageways concerned in the production and excretion of urine from the kidneys to the urinary meatus; see also urinary system.
uveal tract the vascular tunic of the eye, comprising the choroid, ciliary body, and iris.

res·pi·ra·to·ry tract

the air passages from the nose to the pulmonary alveoli, through the pharynx, larynx, trachea, and bronchi.

res·pi·ra·to·ry tract

(res'pir-ă-tōr-ē trakt)
The air passages from the nose to the pulmonary alveoli, through the pharynx, larynx, trachea, and bronchi.

Respiratory tract

The air passages from the nose to the air sacs of the lungs, including the pharynx, larynx, trachea, and bronchi.

res·pi·ra·to·ry tract

(res'pir-ă-tōr-ē trakt)
The air passages from the nose to the pulmonary alveoli.
References in periodicals archive ?
Research has shown that the upper respiratory passage expansion is reduced at the end of expiration partly as a result of an increase in the thickness of the lateral pharyngeal wall.
The warm salty broth hydrates, thins mucus secretions, soothes irritated respiratory passages, and provides some nutrition.
Under the plan, a peak-flow meter is used to gauge blockage of respiratory passages and provide an early-warning system.
coli (intestines), staphylococcus and streptococcus (skin, respiratory and oral passages), and various fungi (skin and respiratory passages).
Scleroma of the upper respiratory passages: a CT study.
They are small enough to bypass the natural defenses of upper respiratory passages, such as hairs in the nose or the hairlike cilia in the bronchial tubes.
Although humidifying the air has not been shown to produce any dramatic benefits during daytime trials, I believe that it lessens irritation to the respiratory passages during nighttime sleep, a time when the relative humidity is usually at its lowest in winter, the usual cold season.
Countercurrent heat exchange in the respiratory passages. Proceedings of the National Academy of Sciences 51:1192-1197.
There are a number of symptoms linked to exposure to formaldehyde including irritation of eyes or upper air passages, sensitivity in respiratory passages and skin irritations.
In some people, however, allergens or other factors may spur a misguided immune response in the mast cells of the respiratory passages, in effect "tricking" these cells into churning out a needless supply of leukotrienes.
The most serious type of reaction is anaphylaxis, an immediate, dramatic attack often characterized by itching and flushing of the skin followed by more serious symptoms such as severe vomiting and diarrhea, spasm of the larynx, constriction of respiratory passages, and swelling of blood vessels.
In addition, in the said case intubation, was avoided as there was risk of dislodgement of coin into the lower respiratory passages.