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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
2
|
| pubmed:dateCreated |
1985-2-5
|
| pubmed:abstractText |
The fetal microvascular architecture of the feline near-term placenta was investigated using scanning electron micrographs of partially fractured corrosion casts from plastic-filled vessels. The findings were compared with those on corresponding semithin histological sections. The branches of both umbilical arteries and veins roughly follow a course parallel to the zonary girdle on the allantochorionic side of the feline placenta in an acute-angled pattern of ramifications. They join the double-layered capillary networks in the chorionic lamellae of the labyrinth, which generally exhibit a chorio-uterine orientation and are partially twirled. On the allantochorionic side of the labyrinth, these fetal capillary networks are "suspended" on the maternal stem-artery-system of the placenta; on the uterine side, they have peduncular or tuft-like endings of capillary loops and are flattened by the uterine septa, which at this level converge into the maternal veins. The chorionic capillary lamellae have a variable breadth and length and therefore need shorter or longer arterioles and venules from the allantochorionic side to become irrigated at any level of the labyrinth. As a result, the feline placenta is characterized by a generally one-way crosscurrent type of materno-fetal blood flow.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:issn |
0340-2061
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
170
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
209-16
|
| pubmed:dateRevised |
2006-11-15
|
| pubmed:meshHeading |
pubmed-meshheading:6517355-Animals,
pubmed-meshheading:6517355-Blood Vessels,
pubmed-meshheading:6517355-Cats,
pubmed-meshheading:6517355-Female,
pubmed-meshheading:6517355-Fetus,
pubmed-meshheading:6517355-Microscopy, Electron, Scanning,
pubmed-meshheading:6517355-Models, Anatomic,
pubmed-meshheading:6517355-Placenta,
pubmed-meshheading:6517355-Pregnancy
|
| pubmed:year |
1984
|
| pubmed:articleTitle |
The blood vessels of the cat girdle placenta. Observations on corrosion casts, scanning electron microscopical and histological studies. II. Fetal vasculature.
|
| pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|