•   Patient Information: Sacheen, a 20-year-old smoker, presents with a worsening cough, thick mucus production, sore throat, and chest congestion after an initial mild cough.
•   Medical History: Sacheen recently experienced symptoms of a common cold, including runny nose, fatigue, and mild cough.
•   Doctor’s Actions: Dr. Tsosie examines Sacheen, inquires about her symptoms and medical history, and measures her blood oxygen level using a pulse oximeter.
•   Diagnosis: Sacheen has bronchitis, an infection commonly occurring after a cold or flu.
•   Treatment Recommendations: Dr. Tsosie recommends Sacheen to thin and remove mucus by drinking plenty of fluids, using a humidifier, getting plenty of rest, and avoiding smoking.
•   Chapter Overview: The chapter will cover the respiratory system, the process of respiration, and acute bronchitis.
•   Respiratory System Overview: Includes lungs, bronchial tubes, and the rest of the respiratory tract, responsible for breathing and gas exchange.
•   Breathing Regulation: Rate of breathing is regulated to maintain blood gas and pH homeostasis.
•   Respiratory Disorders: Asthma, pneumonia, COPD, and lung cancer are examples of respiratory system disorders.
•   Content Source: This page is from a CK-12 licensed resource authored by Suzanne Wakim & Mandeep Grewal.
•   Content Topic: Respiratory System and Gas Exchange.
•   Content License: CK-12 license.

•   Respiration Definition: The process of releasing water vapor and other gases from the body.
•   Breath Visibility: Exhaled warm, moist air condenses into tiny droplets in cold weather, making it visible.
•   Respiration and Temperature: Exhaled air is warm and contains water vapor, which condenses in cold air.
•   Respiration Definition: Life-sustaining process of gas exchange between the body and the atmosphere, involving oxygen intake and waste gas removal.
•   Respiratory System Function: Supplies oxygen for cellular respiration and removes carbon dioxide produced by cells.
•   Respiratory System Processes: Ventilation (breathing) and gas exchange (oxygen and carbon dioxide diffusion).
•   Respiratory System Organs: Lungs, trachea, bronchi, and diaphragm are involved in respiration.
•   Upper Respiratory Tract Function: Provides a route for air to move between the outside atmosphere and the lungs, cleaning, humidifying, and warming the incoming air.
•   Nasal Cavity Function: Warms and humidifies inhaled air, traps foreign particles, and contains chemoreceptors for smell and taste.
•   Pharynx Function: Connects nasal cavity and mouth to the throat, serving as a passageway for both air and food.
•   Larynx Function: Connects pharynx and trachea, houses vocal cords for sound production, and protects the trachea from food aspiration.
•   Lower Respiratory Tract: A tree-like branching system of passages within the lungs.
•   Respiratory Tract Structure: Inverted tree-like shape with 1,500 miles of airways conducting air to the lungs.
•   Trachea Function: Connects the larynx to the lungs, allowing air passage.
•   Lung Function: Site of gas exchange between air and bloodstream.
•   Lung Structure: Two lungs, right lung larger with three lobes and left lung smaller with two lobes, suspended in the pleural cavity.
•   Alveoli Function: Tiny air sacs where gas exchange occurs, providing a large surface area for oxygen absorption and carbon dioxide release.
•   Blood Supply: Lungs receive deoxygenated blood for oxygenation and oxygenated blood for cellular respiration.
•   Respiratory System Importance: Vital for survival, requiring protection due to its exposure to harmful substances.
•   Mucociliary Escalator: A primary defense mechanism where mucus traps particles and cilia move them away from the lungs.
•   Coughing Mechanism: An involuntary response to remove mucus, debris, and irritants from the respiratory tract.
•   Sneezing Mechanism: Sneezing is an involuntary response triggered by irritation in the nasal passage, resulting in the forceful expulsion of air, mucus, and debris from the mouth.
•   Respiratory System and Homeostasis: The respiratory system collaborates with the nervous and cardiovascular systems to maintain homeostasis in blood gases (oxygen and carbon dioxide) and pH levels.
•   Carbon Dioxide Regulation: The body primarily monitors carbon dioxide levels to regulate breathing rate and maintain blood gas and pH balance.
•   Respiratory and Cardiovascular System Interaction: The respiratory system exchanges gases with the outside air, while the cardiovascular system transports these gases to and from body cells.
•   Choking Definition and Causes: Choking is the mechanical obstruction of airflow into the lungs, often caused by objects blocking the pharynx or trachea, particularly in young children.
•   Choking Symptoms and Signs: Inability to speak or cry, labored breathing, clutching the throat, and blue discoloration of the face indicate choking.
•   Choking Treatment for Infants: Turn the baby upside down and slap on the back to dislodge the object.
•   Choking Treatment for Older People: Encourage coughing, give back slaps, and if needed, perform the Heimlich maneuver.
•   Emergency Action for Choking: If choking persists after the Heimlich maneuver, call for emergency medical care.
•   Respiratory System Overview: The respiratory system facilitates breathing, enabling the exchange of oxygen and carbon dioxide.
•   Key Components: The respiratory system includes the larynx, lungs, alveoli, and ciliated epithelium.
•   Respiratory Processes: Breathing involves inhalation and exhalation, while sneezing is a reflex action to expel irritants.
•   Page Source: This page is from CK-12 and authored by Suzanne Wakim & Mandeep Grewal.
•   Content License: The page is shared under a CK-12 license.
•   Content Topic: The page is about the structure and function of the respiratory system.