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.
2 3. Explain how the students will model the movement of the water molecules from one location to another. Water often moves in its liquid form. When the students are moving as liquid water they will travel in pairs, representing the many molecules in a drop of water.