Respiration rate — breaths per minute?
About 15 breaths per minute at rest.
Daily lung ventilation — volume?
Approximately 10,000 liters of air.
Oxygen delivery — role?
Supplies oxygen to body cells.
CO2 removal — role?
Removes carbon dioxide from the body.
Lungs and circulatory system — cooperation?
Exchange gases to meet body needs.
Deoxygenated blood — path?
Sent from heart to lungs.
Oxygenated blood — path?
Returned to the heart after oxygenation.
Main airflow structures — order?
Nose/mouth → pharynx → trachea → bronchi → bronchioles → alveoli.
Trachea support — structure?
Supported by cartilage rings.
Branching to alveoli — pathway?
Trachea splits into bronchi, then bronchioles, ending in alveoli.
Gas exchange site?
Occurs in alveoli and capillaries.
Alveoli walls — feature?
Thin to allow gas diffusion.
Capillaries — role?
Surround alveoli for gas exchange.
Breathing mechanics — muscle?
Diaphragm and rib cage muscles.
CO2 control — mechanism?
Breathing adjusts based on blood CO2 levels.
Respiratory system — animals?
Varies; gills in fish, lungs in mammals.
Fish gills — function?
Gas exchange using water passing over gills.
TB — main symptoms?
Fever, cough, weight loss, chest pain.
TB transmission?
Spread between people via airborne droplets.
TB diagnosis?
X-ray shows lung infection.
Asthma — airway change?
Bronchioles constrict, reducing airflow.
Inhaler — purpose?
Relieves bronchoconstriction symptoms.
Emphysema — alveoli?
Walls deteriorate, impairing gas exchange.
Smoking — effect?
Causes alveoli damage in emphysema.
Testez vos connaissances avec un QCM de 12 questions sur Introduction to Respiratory System.
1. What best describes daily lung ventilation at rest and during normal activity?
2. How do the respiratory and circulatory systems work together to deliver oxygen to body cells?
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