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Welcome to my TEAS Exam Prep blog. I hope it will help you prepare very well for the pre-nursing entrance exam, popularly known as the TEAS exam. This is one of the entrance exams required by some schools for those who want to pursue careers in the nursing field in the USA. I will attempt to break down the review materials into manageable parts so that you can systematically and efficiently prepare for the test with less stress. I will guide you to prepare for the entire content of the test. Hopefully, you will be able to pass after going through these series.


Best of luck!




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Friday, January 8, 2016

HOW PARTICLES ARE PREVENTED FROM ENTERING THE LUNGS

The respiratory system prevent harmful substances in the air from entering the lungs using the following built-in structures:
·         Hairs in your nose help filter out large particles.
·         Cilia (microscopic hairs), found along the air passages, move in a sweeping motion to keep the air passages clean. They sweep in such a way that they bring the particle toward the throat to be coughed out.
·          Mucus produced by cells in the trachea and bronchus moisten the air passages. It also helps to trap dust, bacteria and viruses, and other substances that were not trapped by the hairs from entering the lungs.
·         With the aid of the cilia, impurities that reach the deeper parts of the lungs are moved up via mucous and coughed out or swallowed.

·         The condition called bronchitis (inflammation of the bronchi) occurs if harmful substances, such as cigarette smoke, are inhaled and the cilia stop functioning properly.

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