Mucosal microvascular architecture of the fundus and body of human stomach.

Abstract:

:Vascular casts of human oxyntic mucosa, examined by scanning electron microscopy, revealed that (a) arterial breakup occurs only at the submucosal aspect of the mucosa, there being no arterial vessels further into the mucosa and (b) mucosal capillaries drain into the infrequent mucosal venules only in the most luminal region of the lamina propria immediately underlying the surface mucus cells; the mucosal venules do not receive capillary tributaries deeper within the mucosa. Thus, blood flow in the mucosal exchange vessels can only occur in a unidirectional fashion, from the serosal to the luminal aspect. Using transmission electron microscopy, an often intimate association was seen between the fenestrated mucosal capillaries and parietal cells. These findings are together incorporated into a hypothesis that proposes vascular transport of HCO3-, released interstitially by secreting parietal cells, from deep within the mucosa toward the surface epithelium, thereby assisting gastric mucosal defense against luminal acid.

journal_name

Gastroenterology

journal_title

Gastroenterology

authors

Gannon B,Browning J,O'Brien P,Rogers P

subject

Has Abstract

pub_date

1984-05-01 00:00:00

pages

866-75

issue

5 Pt 1

eissn

0016-5085

issn

1528-0012

pii

S0016508584001086

journal_volume

86

pub_type

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