Alveoli are the basic functional units of the human respiratory system, acting as tiny air sacs that exchange gases. Air inhaled through the mouth and nose flows into the lungs through the branched ...

Artificial ventilation can save lives, but it also puts pressure on lung tissue. If the lungs are pre-damaged, pressurized ventilation can even have undesirable effects. This is especially true of ...

Inhalation and exhalation is the same as breathing or ventilation and is a physical process which moves air into and out of your lungs. Respiration is not the same as breathing, and is a chemical ...

Warmed and humidified inspired air continues its journey from the larynx into the lower respiratory tract (see the first part of this four-part series) and passes next through the trachea. The trachea ...

Breathing intakes oxygen and expels carbon dioxide, and this gas exchange takes place in the alveoli in the lungs. Alveoli contain type 1 alveolar epithelial cells (AT1), which are involved in the ...

Specialized lung cells appear in the developing fetus much earlier than scientists previously thought. A new animal study (“Early lineage specification defines alveolar epithelial ontogeny in the ...