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Running head: MOS 5425 TOXICOLOGY U4MOS 5425 Toxicology U4Students NameInstitutional Affiliation1MOS 5425 TOXICOLOGY U42MOS 5425 Toxicology U4IntroductionParticulate matter (PM) is liquid or solid fragments floating in the atmosphere. Smallparticles (PM2.5) are toxic to humans health as they enter and diffuse into the lung, causinghealth-related respiratory conditions like COPD and asthma. PM is generated from road dust,combustion of fossil fuels, agriculture, and construction activities. Besides, the detrimentalimpact caused by PM has become a warranting issue and a significant concern to public healthglobally. Therefore, the paper seeks to address the selected toxicant by analyzing the affectedbody system, describing how the exposure to PM2.5 is possible, as well as explaining the acuteand chronic effects of the toxicant.DiscussionDescription of the Normal Function of the Respiratory SystemRoberts, James, and Williams (2015) state that the fundamental function of therespiratory is to obtain oxygen for utilization by the bodys cells as well as eliminating CO2produced by the cells. The respiratory system includes the lung and the respiratory tract. Therespiratory tract refers to a path which air takes when inhaled via the nose to the lungs. One ofthe main parts of the respiratory tract includes the extrathoracic chamber, which consists of themouth, nose, larynx, oropharynx, and nasopharynx. Notably, in this chamber, air enters via theno ...


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