Structure E in the given image is small intestine of human digestive system.
Human digestive system
The digestive system consists of gastrointestinal tract- GI tract along with the accessory organs of digestion including tongue, salivary glands, pancreas, liver and gall bladder.
Here in the given image of human digestive system the marked structures are,
A - salivary glands
B - esophagus
C - stomach
D - pancreas
E - small intestine
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