right ventricle

The medical term for the condition of blood in the chest cavity is hemothorax. This condition may result from trauma.

The ones with no legs or chest wounds.

Paradoxical chest movement is also know as flail chest and is usually caused by trauma to the chest. If a person suffers from broken ribs or punctured lungs, the air movement is reversed. Instead of chest expansion on inhalation, you will notice the skin being sucked in.

Any kind of chest trauma or brain injury can affect the mechanics of breathing.