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| trachea | |
|---|---|
| Name | Trachea |
| Latin | Trachea |
| System | Respiratory system |
| Location | Neck and thorax |
| Arteries | Inferior thyroid artery, bronchial arteries |
| Veins | Inferior thyroid veins, bronchial veins |
| Nerves | Vagus nerve, recurrent laryngeal nerve |
| Precursor | Laryngotracheal diverticulum |
trachea
The trachea is a tubular airway that conducts air between the Larynx and the Bronchi within the Neck and Thorax. It provides a patent conduit for ventilation during respiration and interacts with structures such as the Esophagus, Thyroid gland, and major vessels including the Aortic arch and Superior vena cava. The structure and position of the trachea are relevant to surgical teams from institutions like Mayo Clinic and Johns Hopkins Hospital and to historical figures in anatomy such as Andreas Vesalius and William Harvey.
The trachea is formed by C-shaped cartilaginous rings of hyaline cartilage, a membranous posterior wall, and mucosal lining derived from respiratory epithelium; these components are studied in departments at Harvard Medical School, Karolinska Institute, and University of Oxford. Superiorly it articulates with the Cricoid cartilage and inferiorly bifurcates into the primary bronchi at the level of the Sternal angle, near vertebral levels T4–T5, a relationship emphasized by surgeons at Cleveland Clinic and radiologists at Massachusetts General Hospital. The mucosa contains ciliated pseudostratified columnar epithelium and submucosal glands, with lymphatic drainage to regional nodes including the Paratracheal lymph nodes referenced in oncologic protocols from MD Anderson Cancer Center and Memorial Sloan Kettering Cancer Center. Innervation includes autonomic fibers from the Vagus nerve and motor branches of the Recurrent laryngeal nerve, concepts central to head and neck surgery literature from Guy's Hospital and textbooks by authors like Henry Gray.
Embryologically the trachea arises from the laryngotracheal groove and diverticulum originating from the foregut, a topic covered in curricula at Stanford University School of Medicine and University College London. Molecular signals such as the Sonic hedgehog pathway, Fibroblast growth factor family, and transcription factors like NKX2-1 regulate separation of the tracheoesophageal septum, investigated in research at institutions including the Max Planck Society and the National Institutes of Health. Congenital anomalies such as tracheoesophageal fistula and tracheal agenesis are described in case series from Great Ormond Street Hospital and surgical repair strategies appear in reports originating from Boston Children's Hospital.
The trachea maintains airway patency to facilitate airflow to the Lungs during ventilation studied in physiology labs at University of Cambridge and Imperial College London. Its mucociliary clearance apparatus transports particulates and pathogens toward the Pharynx and Nasal cavity, an important defense highlighted in infectious disease literature involving agencies like the World Health Organization and the Centers for Disease Control and Prevention. The trachea also participates in cough generation via reflex arcs involving the Vagus nerve and brainstem nuclei described in neurology texts influenced by research from Karolinska Institute and Yale School of Medicine.
Diseases affecting the trachea include tracheitis, tracheomalacia, stenosis, neoplasms such as squamous cell carcinoma and adenoid cystic carcinoma, and traumatic injury; management principles are discussed in guidelines from American Thoracic Society and European Respiratory Society. Iatrogenic injuries can occur during intubation by teams from Royal London Hospital and during tracheostomy techniques refined at Guy's Hospital and Lahey Hospital & Medical Center. Oncologic staging and airway management feature in protocols from NCI and multidisciplinary tumor boards at Memorial Sloan Kettering Cancer Center and MD Anderson Cancer Center. Emergency airway algorithms involving cricothyrotomy and tracheostomy are taught in training programs from American College of Surgeons and Royal College of Surgeons.
Radiographic evaluation uses chest radiography and computed tomography employed at Mayo Clinic and Johns Hopkins Hospital for assessing tracheal deviation, stenosis, or masses. Flexible and rigid bronchoscopy performed by pulmonologists at Bellevue Hospital and Mount Sinai Hospital permit visualization, biopsy, and stent placement; these procedures are informed by interventional bronchoscopy literature from European Society of Thoracic Surgeons and American Thoracic Society. Virtual bronchoscopy and magnetic resonance imaging protocols developed at Massachusetts General Hospital and University of California, San Francisco assist preoperative planning for airway reconstruction in centers like Great Ormond Street Hospital.
Across vertebrates the trachea varies: mammals possess cartilaginous rings, birds have a mobile syrinx at the bronchial junction relevant to works by Charles Darwin on avian biology, and reptiles exhibit differing airway cartilages studied at institutions like the Smithsonian Institution and Natural History Museum, London. Anatomical variations in humans include cervical elongation, tracheal bronchus, and vascular impressions from aberrant vessels such as an aberrant right subclavian artery described in surgical case series from Johns Hopkins Hospital and Royal Brompton Hospital. Evolutionary and comparative studies are presented in journals affiliated with societies like the Linnean Society and publications from the Royal Society.
Category:Respiratory system