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.
A lung adenocarcinoma is a type of lung cancer that begins in the glandular cells of the lungs. These cells create and release fluids such as mucus. About 40 percent of all lung cancers are non-small cell adenocarcinomas. The two other main types of lung cancer are squamous cell carcinoma and large cell carcinoma. The majority of cancers that begin in the breast, pancreas, and prostate also are adenocarcinomas.