Respiratory Diseases and Conditions

This section covers various respiratory ailments, from acute viral infections to chronic conditions that affect breathing and lung function.

Definition: Chronic respiratory diseases are long-term conditions that affect the airways and other lung structures.

Highlight: Lung cancer, often associated with smoking and second-hand smoke exposure, involves uncontrolled growth of abnormal cells and can be fatal.

Example: Common viral respiratory infections include:

• Influenza (flu)
• Pneumonia
• Enterovirus
• COVID-19

Vocabulary:

• COPD: Chronic Obstructive Pulmonary Disease
• Emphysema: A chronic lung condition causing shortness of breath
• Bronchitis: Inflammation of the bronchial tubes, can be acute or chronic

Respiratory System Components and Functions

The respiratory system consists of several interconnected organs working together to facilitate breathing and gas exchange. Starting from the nose, air travels through various structures before reaching the lungs where oxygen absorption occurs.

Definition: The respiratory system is a series of organs responsible for taking in oxygen and releasing carbon dioxide, with the lungs serving as the primary organ.

Vocabulary:

• Pharynx: A passage connecting the nasal and oral cavities
• Larynx: Hollow muscular organ containing vocal cords
• Bronchioles: Smallest air passageways branching from bronchi
• Alveoli: Microscopic air sacs where gas exchange occurs

Highlight: The epiglottis, a specialized flap of elastic cartilage, prevents food from entering the respiratory tract during swallowing.

Example: The respiratory and digestive systems share the pharynx, which is divided into three regions: nasopharynx (nose throat), oropharynx (mouth throat), and laryngopharynx (voice box area).