Why a Chest Tube is Placed. A chest tube is placed for a variety of reasons. One reason, as you mentioned, is to help the lung re-inflate when someone has a collapsed lung, also known as a pneumothorax. In that circumstance, a chest tube is inserted along the side of the ribs to allow the lung to reinflate.
A. Osmosis is the passive movement of water from an area high in water concentration, across a semi-permeable membrane, to an area low in water concentration.
Water particles (molecules) move transversely to the direction of propagation of the wave. That means that as the wave moves out across the water, which is its direction of prâ¦opagation, the water molecules move up and down (transversely) to create the crests and troughs of the wave. Lost in fact and fiction.