File:Alveolar-sac-01.jpg

From Embryology

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Alveolar Sac

Alveous

Alveolar Type I cell - (squamous alveolar) cells form the structure of an alveolar wall.

Alveolar Type II cell - (great alveolar) cells secrete pulmonary surfactant.

  • surfactant is continuously released by exocytosis
  • lowers the surface tension of water and allows the membrane to separate
  • increases the capability to exchange gases.

Macrophages - destroy foreign material and debris.

Compare the above diagram structure with the alveoli histology and electron microscope image.


Respiratory Histology: Bronchiole | Alveolar Duct | Alveoli | EM Alveoli septum | Alveoli Elastin | Trachea 1 | Trachea 2 | labeled lung | unlabeled lung | Respiratory Bronchiole | Lung Reticular Fibres | Nasal Inferior Concha | Nasal Respiratory Epithelium | Olfactory Region overview | Olfactory Region Epithelium | Histology Stains


Respiratory Links: respiratory | Science Lecture | Lecture Movie | Med Lecture | Stage 13 | Stage 22 | upper respiratory tract | diaphragm | Histology | Postnatal | respiratory abnormalities | Respiratory Quiz | Respiratory terms | Category:Respiratory
Historic Embryology - Respiratory 
1902 The Nasal Cavities and Olfactory Structures | 1906 Lung | 1912 Upper Respiratory Tract | 1912 Respiratory | 1913 Prenatal and Neonatal Lung | 1914 Phrenic Nerve | 1918 Respiratory images | 1921 Respiratory | 1922 Chick Pulmonary Vessels | 1934 Right Fetal Lung | 1936 Early Human Lung | 1937 Terminal Air Passages | 1938 Human Histology

Reference

Image Source: modified from figure equation11.png also modified from (Hawgood & Clements 1990). http://herkules.oulu.fi/isbn9514270584/html/c273.html

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current08:40, 25 August 2010Thumbnail for version as of 08:40, 25 August 2010720 × 478 (73 KB)S8600021 (talk | contribs)==Alveolar Sac== Source: modified from figure equation11.png also modified from (Hawgood & Clements 1990). http://herkules.oulu.fi/isbn9514270584/html/c273.html Category:Respiratory Category:Cartoon

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