An alveolus (plural: alveoli, from Latin alveus, "little cavity"), is an anatomical structure that has the form of a hollow cavity. Mainly found in the lung, the pulmonary alveoli are spherical outcroppings of the respiratory bronchioles and are the primary sites of gas exchange with the blood.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Alveolus_diagram.svg" title="File:Alveolus diagram.svg">Alveolus_diagram.svg</a>: <a href="//commons.wikimedia.org/wiki/User:LadyofHats" title="User:LadyofHats">LadyofHats</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Wilfredor" title="User:Wilfredor">Wilfredor</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Wilfredor" title="User talk:Wilfredor"><span class="signature-talk">talk</span></a>)</li></ul>
2010-08-09 16:14
<ul><li><a href="//commons.wikimedia.org/wiki/File:Alveolus_diagram.svg" title="File:Alveolus diagram.svg">Alveolus_diagram.svg</a></li></ul>