EESA10H3 Chapter Notes - Chapter chap 4: Predatory Fish, Intellectual Disability, Cerebral Palsy
30 Jan 2018
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Chapter 4 jan 15: air pollution: combustion products from burning fossil fuels that are released into the air. The trachea divides into two bronchi (singular bronchus), which are also cartilaginous airways, surrounded by muscles, each serving one lung: gas exchange, the real business of breathing, takes place deeper in the lung. Bronchioles divide into respiratory bronchioles very small conducting airways that are a sort of transitional zone which in turn become alveolar ducts. Chapter 4 jan 15: the walls of the alveolar ducts have many outpocketings: clusters of tiny sacs called alveoli. A network of capillaries twines around the alveoli, enabling the exchange of gases: diffusion of oxygen from alveoli to bloodstream, and diffusion of carbon dioxide in the reverse direction. The total alveolar surface area in contact with capillaries is approximately 75 square meters, roughly the area of a tennis court: as a general rule, particulates 10 microns or less in diameter are considered respirable particulates.
