Update
The Oxford Biblical Studies Online and Oxford Islamic Studies Online have retired. Content you previously purchased on Oxford Biblical Studies Online or Oxford Islamic Studies Online has now moved to Oxford Reference, Oxford Handbooks Online, Oxford Scholarship Online, or What Everyone Needs to Know®. For information on how to continue to view articles visit the subscriber services page.
Dismiss

You are looking at 1-20 of 20 entries  for:

  • All: ciliated epithelium x
clear all

View:

Overview

ciliated epithelium

A region of epithelium consisting of columnar or cuboidal cells bearing hairlike appendages (see cilium) that are capable of beating rapidly. Ciliated epithelium performs the function of ...

ciliated epithelium

ciliated epithelium   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
62 words

...ciliated epithelium A region of epithelium consisting of columnar or cuboidal cells bearing hairlike appendages ( see cilium ) that are capable of beating rapidly. Ciliated epithelium performs the function of moving particles or fluid over the epithelial surface in such structures as the trachea, bronchial tubes, and nasal cavities. It often occurs in the vicinity of mucus-secreting goblet cells...

ciliated epithelium

ciliated epithelium  

A region of epithelium consisting of columnar or cuboidal cells bearing hairlike appendages (see cilium) that are capable of beating rapidly. Ciliated epithelium performs the function of moving ...
Trichoplax adhaerans

Trichoplax adhaerans  

A marine species which represents the simplest animal phylum, the Placozoa. In culture these animals are a few millimeters in diameter and about 10 μm thick. There are four cell types: (a) the flat ...
adenoids

adenoids  

Lymphatic tissue covered by ciliated epithelium situated on the posterior wall of the nasopharynx (pharyngeal tonsils). They function as part of the body's immune system and form part of the ring of ...
cilium

cilium  

(pl. cilia)A short minute hairlike structure (up to 10 μm long) present on the surface of many cells, notably in certain protozoans and some types of vertebrate epithelium. Cilia usually occur in ...
basal granule

basal granule   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
12 words

...granule an alternative term for basal body (esp. in ciliated epithelium...

trachea

trachea   Quick reference

The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007

... ( windpipe ) A tube, reinforced with cartilage and lined with ciliated epithelium , which extends from the larynx to the...

epithelium

epithelium   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
105 words

...epithelium ( pl. epithelia ) A tissue in vertebrates consisting of closely packed cells in a sheet with little intercellular material. It covers the outer surfaces of the body and walls of the internal cavities (coeloms) and is often underlain by a basement membrane . It also forms glands and parts of sense organs. Its functions are protective, absorptive, secretory, and sensory. The types of cell vary, giving rise to squamous epithelium ; ciliated epithelium ; cuboidal epithelium , with cube-shaped cells; and columnar epithelium , with rectangular...

cilia (singular

cilia (singular cilium   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
71 words

...( singular cilium ) populations of thin, motile processes found covering the surface of ciliates or the free surface of the cells making up a ciliated epithelium. Each cilium arises from a basal granule in the superficial layer of cytoplasm. The movement of cilia propels ciliates through the liquid in which they live. The movement of cilia on a ciliated epithelium serves to propel a surface layer of mucus or fluid. See axoneme...

adenoid

adenoid   Quick reference

A Dictionary of Dentistry (2 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Dentistry
Length:
44 words

...adenoid n. Lymphatic tissue covered by ciliated epithelium situated on the posterior wall of the nasopharynx (pharyngeal tonsils). They function as part of the body’s immune system and form part of the ring of lymphatic tissue known as Waldeyer’s ring...

mucous membrane

mucous membrane   Quick reference

A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
43 words

...membrane ( mucosa ) In vertebrates, a moist membrane that consists of epithelium (which is often ciliated) overlying connective tissue ; such membranes commonly secrete mucus . The term is particularly applied to the membranes of the digestive and urinogenital...

stratified epithelium

stratified epithelium   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
102 words

...stratified epithelium Epithelium that is made up of a number of layers of platelike (squamous) cells and is present in areas of the body that are subject to wear and tear. Stratified squamous epithelium containing keratin forms the outer layer of the skin; stratified epithelial cells that do not contain keratin are found in moist areas, such as the mouth and vagina. A pseudostratified epithelium , e.g. the ciliated cells of the mucous membrane lining the respiratory tract, consists of a single layer of cells whose nuclei are arranged at varying heights...

cilium

cilium n.   Quick reference

Concise Medical Dictionary (10 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Clinical Medicine
Length:
58 words

... n. ( pl. cilia ) 1. a hairlike process, large numbers of which are found on certain epithelial cells and on certain (ciliate) protozoa. Cilia are particularly characteristic of the epithelium that lines the upper respiratory tract, where their beating serves to remove particles of dust and other foreign material. 2. an eyelash or eyelid. — ciliary ...

Trichoplax adhaerens

Trichoplax adhaerens   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
156 words

...are a few millimeters in diameter and about 10 μm thick. There are four cell types: (a) the flat covering cells of the dorsal epithelium, each with a single cilium, (b) ventral cylindrical, ciliated epithelial cells, (c) ventral, nonciliated gland cells that secrete digestive enzymes, and (d) cells containing contractile fibers in their cytoplasm which reside in the space between the dorsal and ventral epithelia. The ventral ciliated cells are adhesive and capable of resorbing materials that have been digested from the substrate. Trichoplax has the smallest...

mucous membranes

mucous membranes   Reference library

The Oxford Companion to the Body

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology, Life Sciences
Length:
800 words

...the mucous membrane is that they are ciliated . The beating movement of the cilia helps to shift upwards and outwards any foreign particles which adhere to a layer of mucus secreted from interspersed goblet cells. (In the finest tubes of the bronchial tree the cells become progressively flatter, until in the alveoli they form the thinnest lining of any epithelium anywhere in the body, facilitating diffusion of gases — no longer called a mucous membrane.) In parts of the genital tracts also, the lining cells are ciliated, assisting movement of an ovum down the...

Horseshoe Worms

Horseshoe Worms   Reference library

The Encyclopedia of Underwater Life

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
974 words
Illustration(s):
1

...essentially wormlike. At the front is a well developed horseshoe-shaped lophophore, which in plan resembles two crescents, a smaller one set inside a larger one with their ends touching. The mouth lies between the two crescents. From these crescentlike foundations, a number of ciliated tentacles arise to form the lophophore crown; in some species the crescent tips may be rolled up as spirals, thus increasing the extent of the lophophore. The beating of the cilia drives currents of water down the tentacles and out between their bases. Any small food particles...

lungs

lungs   Reference library

The Oxford Companion to the Body

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology, Life Sciences
Length:
2,600 words
Illustration(s):
2

...inner lining surface, the ‘luminal’ side, there is a layer of epithelium as a kind of skin. Most of the epithelial cells are ciliated, with microscopic ‘hairs’ ( cilia ) that continuously sweep any surface material towards the larynx, where it is coughed up or swallowed. This is the ‘ciliary escalator’. Other cells secrete mucus, the slimy liquid that constitutes phlegm and lies on the cilia. Just under the epithelium is a dense blood capillary network that provides nutrition for the epithelium and glands, and may be the site of uptake of inhaled pollutants...

immunity

immunity   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
828 words

...digestive, respiratory, urinary, and reproductive tracts. Epithelial surfaces secrete mucus, which traps foreign particles, including microorganisms, while tears and saliva help to guard against entry via the eyes and mouth, aided by the enzyme lysozyme . In the airways a ciliated epithelium effectively sweeps away the mucus and trapped particles. Moreover, any pathogens entering in food must survive the highly acidic environment of the stomach. Pathogens that evade these physical and chemical barriers then face innate cellular defences. Macrophages,...

Comb Jellies

Comb Jellies   Reference library

The Encyclopedia of Underwater Life

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
1,269 words
Illustration(s):
2

...compressed, but occupied mainly by the greatly enlarged stomodeum rather than mesogloea. Species in this group are up to 20cm (8in) in length and often have a pinkish color. There are no tentacles; instead food is caught by lips, which curl outward to reveal a glandular and ciliated (macrocilia) area. Relatively large food items are taken in rapidly by a combination of suction pressure from the contraction of radial muscles in the mesogloea and ciliary action. The common North Sea species Beroë gracilis feeds exclusively upon Pleurobrachia pileus ...

Spiny-skinned Invertebrates

Spiny-skinned Invertebrates   Reference library

The Encyclopedia of Underwater Life

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
4,839 words
Illustration(s):
7

...The irregular sea urchins, including the sand dollars and heart urchins, are more specialized feeders. Sand dollars live partly buried in the sand and use their modified spines and tube feet to collect particles of detritus for food. They are then passed to the mouth along ciliated tracts. Heart urchins burrow quite deeply in sand and gravels and ingest the substrate entire. They have lost the Aristotle's lantern. As the substrate particles pass along their guts, any organic material is digested and “clean” substrate is passed out from the anus. Sea...

View: