Digital Histology
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Overview

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x

Mucosa <p>A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x</p>

Mucosa

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x
- Villi <p>A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x</p>

- Villi

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x
- Intestinal glands <p>A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x</p>

- Intestinal glands

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x
Submucosa <p>A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x</p>

Submucosa

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x
- Plica circularis <p>A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x</p>

- Plica circularis

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x
Muscularis externa <p>A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x</p>

Muscularis externa

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x
Serosa <p>A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x</p>

Serosa

A section of the jejunum displays the four layers of the small intestine (mucosa, submucosa, muscularis externa and serosa), including structures that increase surface area, villi and plicae circulares. Villi have a core of lamina propria covered by the intestinal epithelium, including microvilli on absorptive cells. Each plica has a core of submucosa that is overlain by all mucosal layers, including villi. Jejunum, 40x
Main SlideMucosa - Villi - Intestinal glandsSubmucosa - Plica circularis Muscularis externaSerosa