Ciliated Epithelium


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ciliated epithelium

[′sil·ē‚ād·əd ep·ə′thēl·ē·əm]
(histology)
Epithelium composed of cells bearing cilia on their free surfaces.

Ciliated Epithelium

 

in animals and man, epithelial tissue whose cells are furnished with cilia.

The movements of the cilia of each epithelial cell and of the epithelial layer as a whole are closely coordinated. Each cilium is ahead of the next in its phase of movement by a certain length of time, so that the movement of the surface of the layer as a whole appears wavelike. Ciliated epithelium lines the respiratory passages, part of the genitourinary tract, the eustachian tube, part of the tympanic cavity, the central canal of the spinal cord, and the ventricles of the brain. In some animals it is found in the integuments (for locomotion) and in the alimentary canal. The motion of the cilia moves the liquid medium and the solid particles in it. Thus, for example, the cilia help remove dust from the respiratory passages.

On the basis of electron microscopy, scientists have advanced hypotheses suggesting a link between the coordinated movement of the cilia and the breakdown of adenosine triphosphate (ATP). However, the phase of the movement (contraction or relaxation) at which the ATP is utilized has not yet been determined.

REFERENCES

Shmagina, A. P. Mertsatel’noe dvizhenie. Moscow, 1948.
Arronet, N. I. Myshechnye i kletochnye sokratitel’nye (dvigatel’nye) modeli. Leningrad, 1971.

M. E. ASPIZ

References in periodicals archive ?
Eda, "Two cases of mandibular radicular cysts with ciliated epithelium: an electron microscopic study.," Annals of dentistry, vol.
In our previous studies, however, we presented evidence that the horizontal muscular system underlying the ciliated epithelium in the foot sole of L.
Other histological findings are ciliated epithelium in 27(58.70%) of patients, columnar epithelium in 15(32.60%) of patients and squamous metaplasia in 11(23.91%) of patients.
We found that (1) in most cases, the types of epithelium were generally the same in both areas--pseudostratified cylindrical ciliated epithelium with goblet cells (respiratory epithelium), stratified cuboidal epithelium, and stratified squamous nonkeratinized epithelium; (2) the APINC had more respiratory epithelium than the APS; (3) the APS had more squamous epithelium than the APINC; (4) the basement membrane of the APINC was thicker than that of the APS; (5) moderate chronic inflammatory infiltrate was more common in the APINc, and mild infiltrate was more common in the APS; and (6) the APINC had more mucous glands and the APS had more serous glands.
Despite the fact that most nasopharyngeal carcinomas arise from the lateral wall which is lined by secretory pseudostratified ciliated epithelium of respiratory type, adenocarcinoma of the nasopharynx is a rare tumor both in areas of the Far East, with high prevalence of nasopharyngeal carcinoma, and in the western world.[1,5,13] Probably because of this rarity, the possibility that the nasopharyngeal carcinomas, especially of the UCNP type, can exhibit glandular differentiation has been ignored.
The cysts are lined by pseudostratified columnar ciliated epithelium, overlying a relatively prominent fibro muscular layer and occasionally produce mucin.
Pathology of nasopharyngeal branchial cleft cyst is stratified squamous or columnar ciliated epithelium overlying a rich lymphoid tissue.
The most dramatic consequence of this process is the loss of the light organ's superficial ciliated epithelium, resulting in a remodeling of the organ accompanied by hemocyte infiltration into this tissue and apoptosis of associated cells.
They are usually of mullerian (paramesonephric) origin and are lined by a single layer of tubal-type ciliated epithelium. Some paratubal cysts are of mesothelial origin, and these are lined by flattened cells with surrounding fibrous or fatty tissue.
Along this band were densely packed cells with 5-HT-like immunoreactivity; the apical ends of these cells extended to the edge of the ciliated epithelium. These cells were pyramidal and connected basally via a thick immunopositive tract [ILLUSTRATION FOR FIGURE 6A OMITTED].
Metaplasia with ciliated epithelium at places was found in 44[58%] cases.