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Overview cross section through the duodenum of a rat

Legend:

1  smooth muscle
2  villi with resorptive epithelium (mucosa)
3  submucosa
4  lumen (+ food particles)
5  glandular tissue

English name: Black rat
Scientific name: Rattus rattus
Familia: Muridae
Classis: Mammalia
Phylum: Chordata (subphylum vertebrata)
Regnum: Animalia

Digestive system: intestine tract