... and other chemicals such as benzophyrene and dibenzanthracene. The lung airwaves are covered by a thin cell layer of epithelium, which absorbs cigarette smoke into the lungs. Once the cigarette smoke has been absorbed into the lungs, the components in the cigarette smoke reach the sputum, a type of ... decreases dramatically, causing a stroke. Emphysema is a disease of the lower respiratory system. Cigarette smoking destroys the tiny air sacs in the lungs that absorb oxygen into the blood. This causes breathing to become extremely difficult. People with advanced emphysema may use 80% of t...

• Word Count: 1697
• Approx Pages: 7
• Grade Level: High School

... are the smallest of a series of cavities in the lungs.The lungs are designed to receive air, which enters the body through the mouth or the nose. The air passes through the pharynx and the larynx and enters the airways, beginning with the trachea and then into the two primary bronchi?(World Book L 527).After the primary bronchi enter the lungs they subdivide ... into smaller and smaller branches, called secondary and tertiary bronchi. Finally ending in the smallest of the conducting ... .Blood from the body fills the right atrium. The right atrium then contracts, squeezing blood through...

• Word Count: 1867
• Approx Pages: 7
• Grade Level: High School

... will be sick. The icy blue-green color of his eyes that freeze my soul at the very core are not the cause though. It's the devilish, thin pupils that remind me of a snake that stare back at me; this is the cause of my sudden nausea. "Besides that guy chasing you was Benjamin. ... , staring me in my big, brown, round-pupil eyes. My adrenaline rushes through me, but I am a marble statue; I can't move an inch. His eyes stay peering into mine, and any threat to break such a hypnotic spell is yet to be determined, but I fear pain would be a result. So I stay locked in his glance as ... the ...

• Word Count: 2252
• Approx Pages: 9
• Grade Level: High School