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Trace the rise of Calvin Coolidge to the presidency of the United States.
Gas Exchange
The biological process through which organisms exchange oxygen and carbon dioxide with their environment, critical for respiration.
Simple Squamous Epithelium
A single layer of flat, scale-like cells that line surfaces involved in passive diffusion, such as the linings of blood vessels and air sacs of the lungs.
Respiratory Surfaces
Areas of the body specifically adapted for gas exchange with the environment.
Loose Connective Tissue
A type of connective tissue that is widely distributed in the body; consists of fibers strewn through a semifluid matrix.
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