Small Intestine Histology Quiz L4

Small Intestine Structure

• The villi structure is responsible for increasing the surface area for absorption in the small intestine.
• Villi are found in the small intestine, specifically in the mucosa layer.

Brunner's Glands

• Brunner's glands are found in the duodenum, the first part of the small intestine.
• These glands are present in the submucosa layer.

Intestinal Crypts

• Intestinal crypts, also known as intestinal glands, are found in the small intestine.
• The function of intestinal crypts is to produce digestive enzymes and mucus.

Microvilli

• Microvilli, also known as the brush border, are present on the apical surface of enterocytes.
• Microvilli increase the surface area for absorption in the small intestine.

Regions of the Small Intestine

• The jejunum is the part of the small intestine that lacks both Brunner's glands and Peyer's patches.
• Peyer's patches are found in the ileum, the last part of the small intestine.
• M cells in Peyer's patches can lead to the secretion of antibodies.

Crypts of Lieberkühn

• Crypts of Lieberkühn are present at the base of the villi.
• These crypts contain stem cells that differentiate into enterocytes.

Villi Epithelium

• The epithelium of the villi is covered by enterocytes.
• Enterocytes are responsible for the absorption of nutrients in the small intestine.

Paneth Cells

• Paneth cells are found at the base of the crypts of Lieberkühn.
• Paneth cells contain lysozyme and help with the defense against bacteria.

Peyer's Patches

• Peyer's patches are found in the mucosa layer of the ileum.
• Peyer's patches are responsible for the immune response in the small intestine.