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Movement of air from inside the body into the bronchial tree and alveoli, followed by a reversal of this air movement

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-The diaphragm and external respiratory muscles relax.
-Elastic tissues of the lungs and thoracic cage, which were stretched during inspiration, suddenly recoil, and surface tension collapses alveolar walls
-Tissues recoiling around the lungs increase the intraalveolar pressure.
-Air is squeezed out of the lungs.

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-Nerve impulses travel on phrenic nerves to muscle fibers in the diaphragm, contracting them.
-As the dome-shaped diaphragm moves downward, the thoracic cavity expands
-At the same time, the external intercostal muscles may contract, raising the ribs and expanding the
thoracic cavity further
-The intra-alveolar pressure decreases
-Atmospheric pressure, which is greater on the outside, forces air into the respiratory tract through the air passages
-The lungs fill with air
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Shier, David et al. Hole's Essentials Of Human Anatomy & Physiology.

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-Common lung disease caused by an infection in the air sacs
-Symptoms
*Cough, fever, shaking chills and shortness of breath, can range from mild to severe

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-Symptoms
*Chronic coughing, changes in voice, harsh breathing , and coughing blood
-Leading cause of death among men and women

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-Chronic inflammation of the lung airways
-Symptoms
*Coughing, wheezing, chest tightness, or shortness of breath
-Causes
*Air pollution, tobacco smoke, infections, etc

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https://www.livescience.com/22616-respiratory-system.html

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-Air comes into the body through the nose. As it passes over the specialized cells of the olfactory system, the brain recognizes and identifies smells. Hairs In the nose clean the air of foreign particles

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-a hollow space within the nose and skull that is lined with hairs and mucus membrane. The function of the nasal cavity is to warm, moisturize, and filter air entering the body before it reaches the lungs

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-The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases, a negative vacuum is created which draws air into the lungs.

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-It is commonly referred to as the throat
- Role is mainly to allow inhaled air entering the nasal cavity to make its way to the respiratory tract

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-Houses the vocal folds, and manipulates pitch and volume, which is essential for phonation. It is situated just below where the tract of the pharynx splits into the trachea and the esophagus.

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-The passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lungs

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-The primary organs of the respiratory system
-The main function of the lungs is the process of gas exchange called respiration

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-Tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream

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-A wide, hollow tube that connects the larynx (or voice box) to the bronchi of the lungs. It is an integral part of the body's airway and has the vital function of providing air flow to and from the lungs for respiration

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-A passage of airway in the respiratory system that conducts air into the lungs

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https://www.unitypoint.org/homecare/article.aspx?id=2448b930-1451-43e4-8634-c0c16707c749

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https://www.innerbody.com/anatomy/respiratory

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https://www.ncbi.nlm.nih.gov/pubmed/4008404