Respiratory · Trachea et oesophagus
Airway
Two tubes, one shared entrance, and a flap of cartilage that keeps you alive every time you swallow.
- Tracheal length
- ~11 cm
- Oesophageal length
- ~25 cm
- Swallows per day
- ~600
- Cilia beat rate
- ~12 to 15 times per second
What it does
The trachea carries air to the lungs, held open by C-shaped cartilage rings and lined with cilia that sweep debris upward. The oesophagus moves food to the stomach by peristalsis, which works even upside down.
The marvel
Air and food cross paths in your throat. The epiglottis folds over the larynx during each swallow, and swallowing itself briefly suspends breathing. You do this roughly 600 times a day, including in your sleep, and almost never think about it.
How to serve it well
Do not ignore progressive swallowing difficulty
Trouble swallowing solids that worsens over weeks is a red flag symptom and needs prompt investigation, not dietary adaptation.
Long-standing reflux changes the lining
Chronic acid exposure can cause Barrett's oesophagus, a precancerous change. Persistent reflux deserves proper management rather than indefinite self-medication.
Alcohol and tobacco multiply each other
For oesophageal and laryngeal cancer the combination is substantially worse than either alone.
Learn back blows and abdominal thrusts
Choking is survivable and time-critical. Knowing what to do for someone else is genuinely part of caring for this system.
Book an appointment
- Food sticking, or difficulty swallowing that is progressing
- Persistent hoarseness lasting more than three weeks
- Chronic cough with reflux symptoms
- Pain on swallowing
Emergency, go now
- Choking: unable to speak, cough, or breathe
- Sudden inability to swallow saliva
- Noisy or laboured breathing with drooling, especially in a child
What you may have been told
“Clearing your throat frequently helps get rid of mucus.”
Forceful throat clearing traumatises the vocal folds and tends to provoke more mucus production, creating a loop. A sip of water and a gentle swallow does the job without the injury.
Where this comes from
- NHS · Dysphagia and hoarseness
- American Cancer Society · Oesophageal cancer risk factors
- Resuscitation Council UK · Choking guidance
LUMEN is education, not medical advice, and it cannot know anything about you. It does not diagnose. If something here matches what you are experiencing, take it to a clinician who can examine you.