Pneumocyte
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The alveoli are lined with two types of cell, the Type I and Type II pneumocytes.
Type I
The Type I pneumocyte is a very large, thin cell stretched over a very large area. This cell cannot replicate and is susceptible to a large number of toxic insults. Type I pneumocytes are responsible for gas exchange occurring in the alveoli.
Type II
The Type II granular pneumocyte is a roughly cuboidal cell that is usually found at the alveolar septal junctions. Type II cells cover about 5% of the surface area of the alveoli, whereas type I pneumocytes (because of their squamous shape) cover 95% of the total area. Even though they cover less surface area, type II cells greatly outnumber type I cells. Type II cells are responsible for the production and secretion of surfactant.
The Type II pneumocyte can replicate in the alveoli and will replicate to replace damaged Type I pneumocytes.
Type II pneumocytes are larger than type I pneumocytes.
See also
External links
- p_25/12650572 at Dorland's Medical Dictionary
- Histology at KUMC resp-resp17 - "Alveoli"
- Histology image: 13905loa – Histology Learning System at Boston University
- Electron micrograph at luc.edu
- Electron micrographs at buffalo.edu
Cost Effectiveness of Pneumocyte
| group5 = Clinical Trials Involving Pneumocyte | list5 = Ongoing Trials on Pneumocyte at Clinical Trials.gov • Trial results on Pneumocyte • Clinical Trials on Pneumocyte at Google
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| list6 = US National Guidelines Clearinghouse on Pneumocyte • NICE Guidance on Pneumocyte • NHS PRODIGY Guidance • FDA on Pneumocyte • CDC on Pneumocyte
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AND (Dose)}} Dosing of Pneumocyte • AND (drug interactions)}} Drug interactions with Pneumocyte • AND (side effects)}} Side effects of Pneumocyte • AND (Allergy)}} Allergic reactions to Pneumocyte • AND (overdose)}} Overdose information on Pneumocyte • AND (carcinogenicity)}} Carcinogenicity information on Pneumocyte • AND (pregnancy)}} Pneumocyte in pregnancy • AND (pharmacokinetics)}} Pharmacokinetics of Pneumocyte •
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AND (pharmacogenomics)}} Genetics of Pneumocyte • AND (pharmacogenomics)}} Pharmacogenomics of Pneumocyte • AND (proteomics)}} Proteomics of Pneumocyte
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| group12 = Patient Resources on Pneumocyte | list12 = Patient resources on Pneumocyte • Discussion groups on Pneumocyte • Patient Handouts on Pneumocyte • Directions to Hospitals Treating Pneumocyte • Risk calculators and risk factors for Pneumocyte
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Symptoms of Pneumocyte • Causes & Risk Factors for Pneumocyte • Diagnostic studies for Pneumocyte • Treatment of Pneumocyte
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| group17 = Informatics Resources on Pneumocyte | list17 = List of terms related to Pneumocyte
