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  2. Emphysema - Wikipedia

    en.wikipedia.org/wiki/Emphysema

    Emphysema is any air-filled enlargement in the body's tissues. [5] Most commonly emphysema refers to the permanent enlargement of air spaces (alveoli) in the lungs, [5][6] and is also known as pulmonary emphysema. Emphysema is a lower respiratory tract disease, [7] characterised by enlarged air-filled spaces in the lungs, that can vary in size ...

  3. Chronic obstructive pulmonary disease - Wikipedia

    en.wikipedia.org/wiki/Chronic_obstructive...

    Chronic obstructive pulmonary disease (COPD) is a type of progressive lung disease characterized by long-term respiratory symptoms and airflow limitation. [8] GOLD 2024 defined COPD as a heterogeneous lung condition characterized by chronic respiratory symptoms (dyspnea or shortness of breath, cough, sputum production and/or exacerbations) due to abnormalities of the airways (bronchitis ...

  4. Pulmonary interstitial emphysema - Wikipedia

    en.wikipedia.org/wiki/Pulmonary_interstitial...

    Pulmonary interstitial emphysema (PIE) is a collection of air outside of the normal air space of the pulmonary alveoli, found instead inside the connective tissue of the peribronchovascular sheaths, interlobular septa, and visceral pleura. (This supportive tissue is called the pulmonary interstitium.) This collection of air develops as a result ...

  5. Respiratory system - Wikipedia

    en.wikipedia.org/wiki/Respiratory_system

    Respiratory system. The respiratory system (also respiratory apparatus, ventilatory system) is a biological system which consists of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives ...

  6. Respiratory epithelium - Wikipedia

    en.wikipedia.org/wiki/Respiratory_epithelium

    t. e. Respiratory epithelium, or airway epithelium, [1] is a type of ciliated columnar epithelium found lining most of the respiratory tract as respiratory mucosa, [2] where it serves to moisten and protect the airways. It is not present in the vocal cords of the larynx, or the oropharynx and laryngopharynx, where instead the epithelium is ...

  7. Subcutaneous emphysema - Wikipedia

    en.wikipedia.org/wiki/Subcutaneous_emphysema

    Subcutaneous emphysema can result from puncture of parts of the respiratory or gastrointestinal systems. Particularly in the chest and neck, air may become trapped as a result of penetrating trauma (e.g., gunshot wounds or stab wounds) or blunt trauma. Infection (e.g., gas gangrene) can cause gas to be trapped in the subcutaneous tissues.

  8. Eustachian tube - Wikipedia

    en.wikipedia.org/wiki/Eustachian_tube

    The Eustachian tube (/ juːˈsteɪʃən /), also called the auditory tube or pharyngotympanic tube, [1] is a tube that links the nasopharynx to the middle ear, of which it is also a part. In adult humans, the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. [2] It is named after the sixteenth-century Italian ...

  9. Outer ear - Wikipedia

    en.wikipedia.org/wiki/Outer_ear

    Utricle. Saccule. Cochlea. Semicircular canals. v. t. e. The outer ear, external ear, or auris externa is the external part of the ear, which consists of the auricle (also pinna) and the ear canal. [1] It gathers sound energy and focuses it on the eardrum (tympanic membrane).