Stomach: pylorus

The junction of the gastric pit with the body of a pyloric gland is shown.  400x

Pyloric glands are highly convoluted and the majority of its cells produce mucus.

The mucin in the cells has been mostly lost during tissue preparation, so those regions of the gland cells (blue arrows) and cells lining the pits (red arrows) are pale staining.  However both cell types show a reddish-staining, basal cytoplasm and nucleus.

The glands are surrounded by lamina propria composed of loose connective tissue.

The muscularis mucosae is the deepest layer of the mucosa and lies just above the submucosa.