glossary of common forestry terminology . Click letter to advance to that section of the glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z . ACRE â Area of land containing 43,560 square feet. A square 1-acre plot measures 209 feet by 209 feet; a circular acre has a radius of 117.75 feet.
Lung cancer is a type of cancer that begins in the lungs. Your lungs are two spongy organs in your chest that take in oxygen when you inhale and release carbon dioxide when you exhale. Lung cancer is the leading cause of cancer deaths in the United States, among both men and women.
The lung is an organ found in your chest cavity. Each lung is divided into lobes. On the left side, you have the left upper- and the left lower- lobe. On the right side, there are 3 lobes: the right upper-, mid-, and lower lobe. A thin lining, called the pleura, surrounds the lobes of the lung. As you breathe, air moves down your windpipe (your trachea), through a tree-like structure called the bronchi.