What these tiny sacs in the lungs do and conditions that can affect them Medically reviewed by Susan Russell, MD Alveoli are ...

Thecodont - roots of teeth in sockets (alveoli) in jawbone The replacement of teeth in the mouth Most vertebrates replace their teeth continuously, generation after generation, throughout life. Some ...

enters our body through the mouth and nose. It travels down the trachea – or windpipe – into one of two bronchi and into bronchioles before entering one of millions of alveoli, where gaseous ...