Duodenum
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The duodenum is the first section of the small intestine in most vertebrates, including mammals, reptiles, and birds. In mammals, it may be the principal site for iron absorption. The duodenum precede
Diagram of the human duodenum with major parts labelled
Dog duodenum 100X
Duodenum with amyloid deposition in lamina propria
Micrograph showing giardiasis on a duodenal biopsy (H&E stain)
Ileum
Videos
The ileum is the final section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear and the terms p
Duodenum
…vertebrates, including mammals, reptiles, and birds. In mammals, it may be the principal site for iron absorption. The duodenum precedes the jejunum and ileum and is the shortest part of the small intestine. In humans, the duodenum is a hollow jointed tube about 25–38 centimetres (10–15 inches) long connecting…
Small intestine
Goblet cells in the wall of an ileum vili. At its sides, enterocytes are visible over a core of lamina propria.
Cross section of ileum with a Peyer's patch circled.
Cross-section histology of intestinal villi of the human terminal ileum.