Mucosa: Villi
Higher magnification of the mucosa shows its three components: a simple columnar epithelium of absorptive enterocytes and goblet cells; a lamina propria of loose connective tissue in which intestinal glands are located; and a thin muscularis mucosae of smooth muscle. Beneath the mucosa is the submucosa. Trichrome stain, 200x
Mucosa
Higher magnification of the mucosa shows its three components: a simple columnar epithelium of absorptive enterocytes and goblet cells; a lamina propria of loose connective tissue in which intestinal glands are located; and a thin muscularis mucosae of smooth muscle. Beneath the mucosa is the submucosa. Trichrome stain, 200x
- Enterocytes
Higher magnification of the mucosa shows its three components: a simple columnar epithelium of absorptive enterocytes and goblet cells; a lamina propria of loose connective tissue in which intestinal glands are located; and a thin muscularis mucosae of smooth muscle. Beneath the mucosa is the submucosa. Trichrome stain, 200x
- Goblet cells
Higher magnification of the mucosa shows its three components: a simple columnar epithelium of absorptive enterocytes and goblet cells; a lamina propria of loose connective tissue in which intestinal glands are located; and a thin muscularis mucosae of smooth muscle. Beneath the mucosa is the submucosa. Trichrome stain, 200x
- Lamina propria
Higher magnification of the mucosa shows its three components: a simple columnar epithelium of absorptive enterocytes and goblet cells; a lamina propria of loose connective tissue in which intestinal glands are located; and a thin muscularis mucosae of smooth muscle. Beneath the mucosa is the submucosa. Trichrome stain, 200x
- Intestinal glands
Higher magnification of the mucosa shows its three components: a simple columnar epithelium of absorptive enterocytes and goblet cells; a lamina propria of loose connective tissue in which intestinal glands are located; and a thin muscularis mucosae of smooth muscle. Beneath the mucosa is the submucosa. Trichrome stain, 200x
- Muscularis mucosae
Higher magnification of the mucosa shows its three components: a simple columnar epithelium of absorptive enterocytes and goblet cells; a lamina propria of loose connective tissue in which intestinal glands are located; and a thin muscularis mucosae of smooth muscle. Beneath the mucosa is the submucosa. Trichrome stain, 200x
- Villi >
Villi are distinguishing features of the small intestine. They are finger-like projections from the surface of the small intestine into the lumen of the organ. Villi are composed of a central core of lamina propria covered by its overlying surface epithelium. The presence of villi is diagnostic for the small intestine.
- Lacteals >
Lacteals are blind-ended lymphatic capillaries that extend into each villus. They function in fat absorption.
Submucosa >
The submucosa consists of dense connective tissue which stains green in this trichrome-stained preparation.