What these tiny sacs in the lungs do and conditions that can affect them Medically reviewed by Susan Russell, MD Alveoli are tiny, balloon-shaped air sacs located at the end of the bronchioles, the ...

WASHINGTON, Sept. 6, 2022 – 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 ...

The lungs are the center of the respiratory (breathing) system. Every cell of the body needs oxygen to stay alive and healthy. Your body also needs to get rid of carbon dioxide. This gas is a waste ...

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 ...