Animation showing the layers of the small intestine. The small intestine is where digestion begins and nutrients are absorbed into the blood. The outer layer (white) is the serous membrane, or serosa. It surrounds a layer of circular muscle (2) and longitudinal muscle (3), that contract and relax to move food along the intestine. Beneath this is the submucosa (4), a layer or connective tissue, and then the mucosa, or mucous membrane (5). The mucosa is lined with epithelium. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Biocosmos / Francis Leroy & Mayric Huart |
Modell-Rechte: | nicht erforderlich |
Länge: | 22 Sekunden |
Seitenverhältnis: | 16:9 |
Restrictions: | - |