This 1930s educational film provides a detailed exploration of the respiratory and excretory systems, combining live-action demonstrations, animations, and intertitles to illustrate human anatomy ...

The respiratory system has a key role in gaseous exchange but also helps to regulate blood pH, control blood pressure and provide non-specific immune defence mechanisms. Like all organ systems, it ...

Introduction The respiratory system has numerous functions. In addition to its major role in gaseous exchange, it is involved in regulating blood pH and controlling blood pressure, and plays an ...