ABSTRACT
The arteries and/or the veins of 30 human stomaches (11 adults,19 infants)were perfused with coloured gelatin or methylmethacrylate.The specimens were madeinto section and spreading preparation,and cast,and studied under LM and SEM.The main results were as follows:1.Mucosal arterioles divided into 2kinds of branches,i.e.luminal arteriole and glandular arteriole,and hadanastomosis.Luminal capillaries which lay in lamina propria around gastric pitoriginated from the luminal arterioles and from the glandular capillaries.2.Mucosalcapillaries drained into mucosal venule at 3 levels,viz.the luminal surface,theglandular neck and the glandular base.There were 2 kinds of venular anastomosis:the anastomosis between the straight mucosal venulae at the level of the glandularneck or the base of the gastric pit,and the basal venular plexus which lay betweenthe muscularis mucosae and the base of gastric gland.3.Mucosal blood vesselsobserved on transverse section might be divided into 3 parts:base-body,neck-body,and gastric pit.In neck-body part the density of capillaries is the highest.4.Flat,round or elliptic impressions of endothelial nuclei can be seen on the cast ofmucosal venule under SEM.It was interesting that a pit was noted at the center ofeach impre-ssion.The importance of mucosal blood vessels in the mucosa is forprotection from invasion and damage effected by luminal contents.