Respiratory Tract

The respiratory tract is a series of organs and tissues involved in breathing and gas exchange. It includes the nose, pharynx, larynx, trachea, bronchi, and lungs. Its primary functions are to deliver oxygen to the bloodstream and remove carbon dioxide from the body. The respiratory tract also filters, warms, and humidifies inhaled air to protect lung tissue.

Common respiratory tract diseases include asthma, chronic obstructive pulmonary disease (COPD), bronchitis, pneumonia, sinusitis, and the common cold. These conditions can affect either the upper respiratory tract (nose, sinuses, throat) or the lower respiratory tract (trachea, bronchi, lungs). Symptoms often include coughing, shortness of breath, wheezing, and congestion.

To protect your respiratory tract, avoid smoking and exposure to secondhand smoke, wear masks in polluted or high-risk environments, practice good hand hygiene, stay up to date with vaccinations (such as flu and pneumococcal vaccines), and maintain indoor air quality with proper ventilation and air purifiers. Regular exercise and a healthy diet also support respiratory immunity.

Upper respiratory tract infections (URTIs) involve the nose, sinuses, pharynx, and larynx, and include conditions like the common cold, sinusitis, and pharyngitis. Lower respiratory tract infections (LRTIs) affect the trachea, bronchi, and lungs, and include bronchitis, pneumonia, and tuberculosis. LRTIs are generally more severe and may require medical intervention compared to most URTIs.

You should consult a healthcare provider if you experience persistent symptoms such as a cough lasting more than 2–3 weeks, high fever, difficulty breathing, chest pain, coughing up blood, or worsening shortness of breath. These could indicate a serious condition like pneumonia, COPD exacerbation, or other lower respiratory tract disorders requiring prompt evaluation and treatment.