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.
Ground water is always moving by the force of gravity from recharge areas to discharge areas. Ground-water movement in most areas is slow-a few feet per year. But, in more permeable zones, such as solution channels in limestone, movement can be as much as several feet per day.round water is always moving by the force of gravity from recharge areas to discharge areas. Ground-water movement in most areas is slow-a few feet per year. But, in more permeable zones, such as solution channels in limestone, movement can be as much as several feet per day.