Linked Life Data

10658199

Source:http://linkedlifedata.com/resource/pubmed/id/10658199

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2000-3-8
pubmed:abstractText
The uterus of the viviparous skink Chalcides ocellatus tiligugu was studied by SEM and LM during the annual cycle. Three functional phases were identified: preovulatory (spring), gestatory (summer), and quiescent (autumn-winter), characterized by changes in the uterine wall (mainly the endometrial layer). In the preovulatory phase, the uterine wall increases in thickness; its luminal epithelium has ciliated cells and two types of unciliated secretory cells. The first type secretes sulfated glycosaminoglycans (GAGs), which form the amorphous inner layer of the eggshell membrane; the second type secretes acidic glycoproteins that form the intrafibrillar matrix of the outer layer of the eggshell membrane. The lamina propria contains simple alveolar glands that secrete the collagen fibers of the eggshell membrane. During the gestatory phase, the glycoproteins produced by secretory cells of the second type have histotrophic activity for the developing embryo. The uterus widens to form incubation chambers with two hemispheres, one embryonic and the other abembryonic. Both a chorioallantoic placenta and an omphaloplacenta with histotrophic activity are present in late gestation. The chorioallantoic placenta, with aspects of a Weekes (1935) Type III placenta, develops in the embryonic hemisphere. The omphaloplacenta forms at the vegetative pole of the egg and shows cellular hypertrophy of the bilaminar omphalopleure and uterus. During the quiescent phase, the uterus gradually decreases in thickness and activity; its luminal epithelium does not show secretory activity. The annual variations in the myometrial layer involved the inner circular and the outer longitudinal muscle layers.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0362-2525
pubmed:author
pubmed:copyrightInfo
Copyright 2000 Wiley-Liss, Inc.
pubmed:issnType
Print
pubmed:volume
243
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
153-65
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Uterine morphology during the annual cycle in Chalcides ocellatus tiligugu (Gmelin) (Squamata: scincidae).
pubmed:affiliation
Department of Zoology and Biological Anthropology, University of Sassari, Sassari, Italy. carcupin@ssmain.uniss.it
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't