THE RESPIRATORY SYSTEM Ch 37.1 Guide Breathing:Mechanical intake gas Diaphram muscle expands & contracts the chest cavity.
Effects & Hazards of Smoking. § Causes millions of deaths each year current § Is expected to cause the premature deaths of half of all current smokers.
Normal Lungs Images: Lung: Lung cross section: Normal lungs and heart: .
CANCER And Cell Division Glencoe Chapter 2. What is Cancer? The division of normal cells is controlled. New cells are only formed for growth or to replace.
Kristin Borrone High School Students “Cancer that forms in tissues of the lung, usually in the cells lining air passages. The two main types are small.
