| Bronchiole | |
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| Diagram of the alveoli with both cross-section and external view. An alveolus (plural alveoli, from Latin alveolus, "little cavity" is an anatomical structure that has the form of a hollow cavity | |
| Gray's | subject #240 1098 |
| Dorlands/Elsevier | Bronchioles/A04.411.125 |
The bronchioles are the first airway branches that no longer contain cartilage. Gray's Anatomy the Respiratory apparatus ( Apparatus Respiratorius Respiratory system Respiratory apparatus Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group The airways are those parts of the Respiratory system through which air flows to get from the external environment to the Alveoli. Cartilage is a type of dense Connective tissue. It is composed of specialized cells called chondrocytes that produce a large amount of extracellular matrix They are branches of the bronchi, and are smaller than one millimeter in diameter. A bronchus (plural bronchi, adjective bronchial) is a caliber of airway in the Respiratory tract that conducts air into the Lungs No Gas The Millimetre ( American spelling: millimeter, symbol mm) is a unit of Length in the Metric system, equal to
There are no glands or cartilage in any of the bronchioles, and the epithelial cells become more cuboidal in shape. A gland is an organ in an animal's body that synthesizes a substance for release such as Hormones or Breast milk, often into the Bloodstream In biology and medicine epithelium is a tissue composed of cells that line the cavities and surfaces of structures throughout the body Cuboidal epithelia are Epithelial cells having a cube-like shape that is their width is approximately equal to their height
The bronchioles terminate by entering the circular sacs called alveoli. An alveolus (plural alveoli, from Latin alveolus, "little cavity" is an anatomical structure that has the form of a hollow cavity
Control of airflow resistance and air distrubution in the lungs is controlled by the bronchioles.
They are composed of hyaline cartilage.
Pathology
Bronchospasm, a life-threatening situation, occurs when the smooth muscular tissue of the bronchioles constricts, severely narrowing their diameter. Bronchospasm is a sudden constriction of the muscles in the walls of the Bronchioles It is caused by the release ( Degranulation) of substances from Mast cells Bronchospasm is commonly treated by oxygen therapy and bronchodilators. Oxygen therapy is the administration of Oxygen as a therapeutic modality A bronchodilator is a substance that dilates the bronchi and Bronchioles decreasing airway resistance and thereby facilitating airflow
The medical condition of inflammation of the bronchioles is termed bronchiolitis. Bronchiolitis is inflammation of the Bronchioles the smallest air passages of the lungs Diseases of the bronchioles include asthma, bronchiolitis obliterans, respiratory syncytial virus infection, and influenza. Asthma is a chronic Condition involving the Respiratory system in which the airways occasionally constrict become inflamed, and are Bronchiolitis obliterans, or Constrictive bronchiolitis, one form of which is called Popcorn Workers' Lung or popcorn lung, is a rare and life-threatening Human respiratory syncytial virus (RSV is a negative-sense single-stranded RNA virus of the family Paramyxoviridae, which includes
Additional images
 Cross sectional cut of primary bronchiole |
 Bronchi, bronchial tree, and lungs |
 1. Trachea |
External links
An alveolus (plural alveoli, from Latin alveolus, "little cavity" is an anatomical structure that has the form of a hollow cavity For similarly-named academic institutions see Education in Boston MA.Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic