Add Yahoo as a preferred source to see more of our stories on Google. The respiratory system is made up of several organs and structures, including the lungs, windpipe, diaphragm and alveoli. It is ...

When a virus enters the lungs, the immune system has to react fast. The lung maintains its own community of immune cells ...

How did ancient fish perceive their environment in the deep sea? An international team led by scientists from the Natural ...