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.
The muscles of our lungs, stomach, and intestines are made of smooth muscle tissue. Cardiac muscle tissue is the third type of muscle tissue. Cardiac muscle tissue makes our hearts. Organs are groups of tissues that work together to do a job.Our skin is made of hair tissue, oil and sweat gland tissues, nerve tissue, blood tissue, and many other tissues to make the organ called skin.his group includes the skin and the inner surfaces of the body such as the surface of the lungs, stomach, intestines, and blood vessels. Connective tissue supports our bodies. Bone, cartilage, and fatty tissue are in this group. These tissues are strong and yet usually can stretch to hold our bodies together.