Acinar
Acinar or Acinus (from Latin acinus "berry", "cluster"; plural acini ) is Latin for glands berry , so the beer-shaped end piece (sero) mucous glands gears, in which the secretion is produced. It is characterized by large and dense epithelial cells with narrow lumen . In the lungs, the acinar is the fine tissue area in which the oxygen exchange takes place.
Glands
In the case of seromucous glands (e.g. submandibular gland ), a so-called (von) Ebnerscher crescent (a serous end piece described by Viktor von Ebner-Rofenstein in 1872 ) may sit on the mucous tubule.
Acini are found mainly in the salivary glands as well as in the liver , lungs and pancreas .
lung
Starting from the terminal bronchiole the airways to transform respiratory bronchioles , in which already alveoli are found in the wall. The airways to the alveolar ducts continue to narrow. These then finally open into the alveolar sacculi. The tissue and all airways and alveoli that can be assigned to a single terminal bronchiolus are called the pulmonary acinar . Gas exchange takes place from the bronchioles respiratorii . The acinar is the place of gas exchange, but also has the properties of a gland due to its epithelia, which produce the surfactant .
See also
Individual evidence
- ^ Gas exchange ( Memento from July 7, 2013 in the Internet Archive ).