In computer networks and telecommunications, a dedicated line is a communications connection or other hardware resource dedicated to a certain application or use. This is different than a shared connection such as a telephone network or the Internet.
Carbon dioxide, a waste product of metabolism, travels from the blood to the alveoli, where it can be exhaled. Between the alveoli is a thin layer of cells called the interstitium, which contains blood vessels and cells that help support the alveoli. The lungs are covered by a thin tissue layer called the pleura. The same kind of thin tissue lines the inside of the chest cavity -- also called pleura. A thin layer of fluid acts as a lubricant allowing the lungs to slip smoothly as they expand and contract with each breath.
Your right lung has three parts 1  (. lobes. ). 2  Your left lung is. smaller and has two lobes. Inside the chest are two thin layers of tissue (the. 3  pleura. ). One layer covers the lungs and the other layer lines the. inside of your chest.  Cancer 1  Cells. Cancer begins  in. 1  cells. , the building blocks that make  up all.