Bronchi are made up of a combination of cartilage and tissue. The cartilage keeps the bronchi strong and open as air travels through with each inhale and exhale. As the airways get smaller and smaller, the ratio of cartilage to smooth muscle decreases.
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 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.
Bronchi are made up of a combination of cartilage and tissue. The cartilage keeps the bronchi strong and open as air travels through with each inhale and exhale. As the airways get smaller and smaller, the ratio of cartilage to smooth muscle decreases.
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 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.