Learn what leukocytes are, their role in immune defense, and why white blood cells matter in respiratory care and lung disease.
John Landry, BS, RRT
John Landry is a registered respiratory therapist from Memphis, TN, and has a bachelor’s degree in kinesiology. He enjoys using evidence-based research to help others breathe easier, live healthier, and improve their overall quality of life.
Can Asthma Turn into COPD? (2026)
Learn whether asthma can turn into COPD and how long-term asthma may lead to lasting airway damage and COPD-like symptoms.
Coughing So Hard You Throw Up: Causes and Treatment (2026)
Learn why severe coughing can trigger vomiting, common causes behind it, and when this symptom may signal an underlying health issue.
Why Do Alcoholics Cough So Much? (2026)
Learn why chronic alcohol use causes persistent coughing, airway irritation, reflux, infections, and long-term respiratory problems.
Where Does Phlegm Come From? (2026)
Learn where phlegm comes from, why the body produces it, and what changes in mucus can reveal about your respiratory health.
What Can You Add to Humidifier Water? (2026)
Learn what you can safely add to humidifier water, which additives to avoid, and how to protect respiratory health and indoor air quality.
Coughing Up Lumps of Jelly: Causes, Risks, and Treatment
Learn what coughing up lumps of jelly means, common causes, and when thick, jelly-like mucus may signal a serious health issue.
Cardiac Tamponade: Overview and Practice Questions (2026)
Learn what cardiac tamponade is, how it affects breathing and circulation, and why early recognition is critical in respiratory care.
Nebulizer: Overview and Practice Questions (2026)
Learn how nebulizers work, their types, performance factors, infection risks, and why they are essential in respiratory care.
Labored vs. Unlabored Breathing: What’s the Difference?
Learn the key differences between labored and unlabored breathing and how each pattern signals normal breathing or respiratory distress.
Chest Trauma: Overview and Practice Questions (2026)
Learn what chest trauma is, common injury types, and why it is critical to respiratory care, ventilation, and patient outcomes.
Inspiratory Capacity (IC): Overview and Practice Questions
Learn what inspiratory capacity is, how it’s measured, and why it matters in assessing lung function and respiratory disease.
Residual Volume (RV): Overview and Practice Questions (2026)
Learn what residual volume is, why it matters in respiratory care, and how it helps assess lung function and disease.
Expiratory Reserve Volume (ERV): An Overview (2026)
Learn what expiratory reserve volume (ERV) is, why it matters in respiratory care, and how it reflects lung function and mechanics.
Inspiratory Reserve Volume (IRV): An Overview (2026)
Learn what inspiratory reserve volume (IRV) is, why it matters in respiratory care, and how it reflects lung function and physiology.
Vital Capacity (VC): Overview and Practice Questions (2026)
Learn what vital capacity is, how it’s measured, and why it’s important for assessing lung function and respiratory health.
Tidal Volume (VT): Overview and Practice Questions (2026)
Learn what tidal volume is, why it matters in respiratory care, and how it impacts ventilation, gas exchange, and patient safety.
Total Lung Capacity (TLC): Overview and Practice Questions
Learn what total lung capacity (TLC) is, how it’s measured, and why it’s essential for diagnosing and managing respiratory disease.
Functional Residual Capacity (FRC): An Overview (2026)
Learn what functional residual capacity (FRC) is, why it matters in respiratory care, how it’s measured, and its clinical significance.
Bronchoprovocation Study: Overview and Practice Questions
Learn how a bronchoprovocation study detects airway hyperreactivity, aiding in the diagnosis and management of asthma.