Archie took several deep breaths of air. by breathing deeply, what mechanism did he assist to return blood to his heart? archie took several deep breaths of air. by breathing deeply, what mechanism did he assist to return blood to his heart? korotkoff sounds skeletal muscle pump respiratory pump mean arterial pressure (map)

The respiratory pump was used. This pump is used to carry blood back to the heart when a patient suffers from venous insufficiency. The blood flow is usually blocked because of blood clots. By breathing, Archie helps the respiratory pump do its job. The pump takes effect from the legs to the heart.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.