Title

Human trachea and bronchi: Structural adaptations in respiratory health

Authors

Ravishankar Kumar¹*, Shravan Kumar¹, Soni Soni², Dhananjay Kumar² & Radhika Raman¹

Affiliation

¹Department of Anatomy, Darbhanga Medical College & Hospital, Darbhanga, Bihar, India; ²Department of Dentistry, Darbhanga Medical College & Hospital, Darbhanga, Bihar, India;  *Corresponding author

Email

Ravishankar Kumar - E-mail: drravishankar2011@gmail.com 

Shravan Kumar - E-mail: drshrav9@gmail.com   

Soni Soni - E-mail: onlysonikumari2021@gmail.com

Dhananjay Kumar - E-mail: dr.dhananjaykrphd@gmail.com

Radhika Raman - E-mail: drramandbg@gmail.com

Article Type

Research Article

Date

Received June 1, 2026; Revised June 30, 2026; Accepted June 30, 2026, Published June 30, 2026

Abstract

The structural and functional interplay between the human trachea and bronchi remains incompletely characterized, limiting precision in airway diagnosis and therapy. Hence, fifty specimens were comparatively evaluated for gross anatomical, histological and airflow-related parameters, with correlation analysis between structural and functional indices. The trachea showed greater diameter (18.6 ± 2.1 mm), uniform C-shaped cartilage and higher goblet cell density, while the bronchi exhibited cartilage plates, greater smooth muscle thickness (78.6 ± 8.4 µm) and higher air distribution efficiency (p < 0.0001). Airway diameter correlated negatively with resistance (r = –0.82) and smooth muscle thickness correlated positively with flexibility (r = 0.79), confirming the trachea as a low-resistance conduit and the bronchi as dynamic airflow modulators. Thus, an integrated structural histological functional profile of the trachea and bronchi with quantitative morphology–airflow correlation, offer an anatomical reference framework for imaging interpretation, airway-device design and management of obstructive airway diseases.

Keywords

Trachea; bronchi; conducting airways; cartilage rings; smooth muscle; airflow dynamics; mucociliary clearance; comparative anatomy; respiratory health

Citation

Kumar et al. Bioinformation 22(6): 3264-3267 (2026)

Edited by

Ritik Kashwani

ISSN

0973-2063

Publisher

Biomedical Informatics

License

This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.