ISSN:
0003-276X
Schlagwort(e):
Blood vessles
;
Nasal mucosa
;
Human fetus
;
Corrosion casting
;
Life and Medical Sciences
;
Cell & Developmental Biology
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Medizin
Notizen:
Background: The vasculature of the nasal mucosa in the human fetus so far has not been investigated morphologically by modern techniques.Methods: Nasal blood vessels were studies in 18-21-week-old human fetuses by corrosion casting and scanning electron microscopy.Results: The general vascular architecture was similar to that described for adult humans, with (1) a dense network of subepithelial capillaries, (2) a mucosal layer of larger vessles, predominantly veins, and (3) large arteries located near the perichondrium. Specific vessel types characteristic of the nasal mucosa and important for its functions in adults, such as cavernous veins or cushion veins, were, however, absent in the fetuses, although probable precursor forms of cushion veins could be observed. The arteriovenous anastomoses had the form of short bridges, and no tortuous or glomerular anastomoses present in the mature nasal mucosa were found.Conclusions: The underdevelopment of some vascular areas is postulated to reflect the functional immaturily of the respiratory system in the fetus. © 1995 Wiley-Liss, Inc.
Zusätzliches Material:
11 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/ar.1092420313
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