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The lower respiratory tract is also called the respiratory tree or tracheobronchial tree, to describe the branching structure of airways supplying air to the lungs, and includes the trachea, bronchi and bronchioles. [8] trachea. main bronchus (diameter approximately 1 – 1.4 cm in adults) [9] lobar bronchus (diameter approximately 1 cm)
The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting 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 and its evolutionary ...
The lungs as main part of respiratory tract. The lower respiratory tract is part of the respiratory system, and consists of the trachea and the structures below this including the lungs. [34] The trachea receives air from the pharynx and travels down to a place where it splits (the carina) into a right and left primary bronchus.
The bronchioles (/ ˈbrɑːŋkioʊls / BRONG-kee-ohls) are the smaller branches of the bronchial airways in the lower respiratory tract. They include the terminal bronchioles, and finally the respiratory bronchioles that mark the start of the respiratory zone delivering air to the gas exchanging units of the alveoli.
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 ...
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 ...
A respiratory examination, or lung examination, is performed as part of a physical examination, [1] in response to respiratory symptoms such as shortness of breath, cough, or chest pain, and is often carried out with a cardiac examination. The four steps of the respiratory exam are inspection, palpation, percussion, and auscultation of ...
In the lower respiratory tract impaired mucociliary clearance due to conditions such as primary ciliary dyskinesia may result in mucus accumulation in the bronchi. [16] The dysregulation of mucus homeostasis is the fundamental characteristic of cystic fibrosis, an inherited disease caused by mutations in the CFTR gene, which encodes a chloride ...