Trachealis muscle

Trachealis muscle is an example of smooth muscle. It bridges the gap between free ends of C-shaped cartilages at the posterior border of the trachea, adjacent to the esophagus.

A primary function of the trachealis is to constrict the windpipe, allowing for higher velocity of air in the windpipe during coughing.

References

Histology a Text and Atlas/ Michael H. Ross, Wojciech Pawlina.,-5th ed., pg.617

Anatomy: Lower RT respiratory system (TA A06.3–5, TH H3.05.02, GA 11.1084)

TB tree

Trachea	Tracheal rings · Annular ligaments of trachea · Carina

Bronchus	main bronchus (right, left) · lobar/secondary bronchi (eparterial bronchus) · segmental/tertiary bronchi

Lungs

General	Left lung/Right lung · Base/Apex · Root/Hilum Superior lobe · Lingula of left lung/Middle lobe of right lung · Inferior lobe borders: Anterior border (Cardiac notch) · Posterior border · Inferior border surfaces: Costal surface · Mediastinal surface (Cardiac impression) · Diaphragmatic surface fissures: Oblique fissure · Horizontal fissure

BP segment	Bronchiole: Conducting zone (Terminal bronchiole) · Respiratory zone (Respiratory bronchiole · Alveolar duct · Alveolus · Blood-air barrier)

Cells	Pneumocyte (Type I pneumocyte, Type II pneumocyte) · Clara cell · Goblet cell

M: RES

anat(n, x, l, c)/phys/devp

noco(c, p)/cong/tumr, sysi/epon, injr

proc, drug(R1/2/3/5/6/7)