XIV. Typical Functional Differentiation of Columnar Epithelium

2015 ◽  
pp. 203-223
Keyword(s):  
Functional Differentiation ◽  
Columnar Epithelium

Ultrastructure of the Omphalomesenteric Duct Rest in the Umbilical Cord at Term

1982 ◽  
Vol 40 ◽  
pp. 250-251
Author(s):  
B. A. Clark ◽  
T. Okagaki
Keyword(s):  
Umbilical Cord ◽  
Umbilical Vein ◽  
Meckel’S Diverticulum ◽  
Meckel's Diverticulum ◽  
Columnar Epithelium ◽  
Omphalomesenteric Duct ◽  
Umbilical Arteries

Vestiges of the omphalomesenteric or vitello-intestinal duct and the pathologic implications attributed to these remnants have been treated in great detail by several investigators. Persistence of the omphalomesenteric duct is associated with such conditions as Meckel's diverticulum, umbilical fistula, mucosal polyps, and sinuses or cysts of the umbilicus. Remnants of the duct in the umbilical cord, although infrequent, are located outside of the triangle formed by the two umbilical arteries and the umbilical vein, are usually discontinuous and are often represented by a small lumen lined by cuboidal or columnar epithelium. This study will examine the ultrastructure of these cells.

Fine structure of the retina of the giant scallop, Placopecten magellanicus

1984 ◽  
Vol 42 ◽  
pp. 312-313
Author(s):  
C.V.L. Powell
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Light Intensity ◽  
Scanning Electron Microscope ◽  
Eye Development ◽  
Preliminary Observation ◽  
Columnar Epithelium ◽  
Placopecten Magellanicus ◽  
Environmental Light ◽  
Scanning Electron

The overall fine structure of the eye in Placopecten is similar to that of other scallops. The optic tentacle consists of an outer columnar epithelium which is modified into a pigmented iris and a cornea (Fig. 1). This capsule encloses the cellular lens, retina, reflecting argentea and the pigmented tapetum. The retina is divided into two parts (Fig. 2). The distal retina functions in the detection of movement and the proximal retina monitors environmental light intensity. The purpose of the present study is to describe the ultrastructure of the retina as a preliminary observation on eye development. This is also the first known presentation of scanning electron microscope studies of the eye of the scallop.

Paradise Lost?

2018 ◽  
Author(s):  
Nicholas Greenwood Onuf
Keyword(s):  
International Society ◽  
Paradise Lost ◽  
Functional Differentiation ◽  
Modern State ◽  
Economic Decline ◽  
Emotional Appeal ◽  
Social Coherence ◽  
Complete Collapse

Whether there has been a transition to something new in what it is possible to think remains to be seen. In the absence of such a transition, we are unlikely to see significant changes in the conditions of rule. If indeed capitalism is a spent force, then economic decline will accelerate and material inequality will increase. Short of a complete collapse, established conditions of rule will be reinforced—the mighty frame ever mightier, the international society of modern state-nations shows no signs of fading away. As migration dilutes blood ties and multiplies languages in daily use, nations depend all the more on territory for their social coherence and emotional appeal. That sovereignty is more difficult to locate spatially only illustrates the effects of modernist functional differentiation, which does not displace space or overlay it so much as penetrate the immediacy of place, every place, stealthily, by making itself indispensable.

Patterns and Determinants of Religious Change in the Modern Period

2017 ◽  
Author(s):  
Detlef Pollack ◽  
Gergely Rosta
Keyword(s):  
Theoretical Perspective ◽  
Functional Differentiation ◽  
Market Model ◽  
Religious Communities ◽  
Religious Change ◽  
State Spending ◽  
Economic Interests ◽  
Government Regulations ◽  
Modern Period ◽  
Determining Factors

Chapter 14 does not design a general theory of religious change, but develops a multiple theoretical perspective including various theoretical elements, which are instrumental for explaining religious changes and which can be combined flexibly. In brief, they are: 1. Functional differentiation as a rule stands in a strained relationship to the integrational capacity of religious communities and churches. If, however, religious identities are linked with non-religious, for example, political, national, or economic interests, religion and church are strengthened. 2. Processes of individualization mostly have an erosive impact on religious ties. 3. In contrast to the assumptions of the market model, religious pluralism does not foster religious vitality, but actually inhibits it. In the case of conflict, though, religious diversity can fuel religious passions. Other determining factors such as government regulations of the religious sector, state spending on the welfare system, social inequality, immigration, and path dependency are also taken into account.

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