Cross-section through the wall of the duodenum of a rat |
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Without labels Legend:
1 longitudinal muscles 2 circular muscles 3 connective tissue 4 mucosa
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English name: Black rat Scientific name: Rattus rattus Familia: Muridae Classis: Mammalia Phylum: Chordata (subphylum vertebrata) Regnum: Animalia
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The alternate wave-like contractions of longitudinal and circular muscles (= peristaltic movement) in the intestine wall are responsible for the flow of food particles in the lumen. ad 4 Mucosa: crypts of Leiberkuhn with germination epithelium |