Drowning and Near Drowning Anatomy
To better understand drowning and near drowning, it helps to understand the anatomy of the lungs.
Inside the chest, the windpipe, or trachea, divides into two smaller tubes: the right bronchus and the left bronchus. The right bronchus enters the right lung and the left bronchus enters the left lung. The right bronchus and left bronchus branch into smaller and smaller tubes.
The smallest tubes, called bronchioles, end in tiny air sacs, called alveoli. Blood flows very close to the walls of the alveoli. Oxygen and carbon dioxide pass between the air and the bloodstream through the wall of the alveoli.
- Papa L, Hoelle R, Idris A. Systematic review of definitions for drowning incidents. Resuscitation. 2005 Jun;65(3):255-64. 
- Peden MM, McGee K. The epidemiology of drowning worldwide. Inj Control Saf Promot. 2003 Dec;10(4):195-9. 
- Salomez F, Vincent JL. Drowning: a review of epidemiology, pathophysiology, treatment and prevention. Resuscitation. 2004 Dec;63(3):261-8.