These sacs, of which there are hundreds of millions, are surrounded by tiny blood vessels that carry the oxygen to other parts of your body. As the oxygen leaves the alveoli, carbon dioxide—a gas ...
After air goes in your trachea, it travels through your bronchi to your lungs, then passes into progressively smaller tubes called bronchioles. It eventually reaches alveoli, super-small air sacs ...
Emphysema is a condition that happens when air sacs in your lungs, called alveoli, are damaged. The damage may come from long-term smoking, pollution, or infections. Your genes can also play a role.
An optimal organ design maximizes not only the number of its basic functional units, for example alveoli in the lung and glomeruli in the kidney, but also the efficiency of transporting gas and liquid ...