Question

the digestive system of most animals is lined with cells through which nutrients are absorbed. what is the embryonic origin of these cells?

Answer 1

The answer is Endoderm.
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Answer 2

Further breakdown of food takes place in the small intestine where enzymes produced by the liver, the small intestine, and the pancreas continue the process of digestion. The nutrients are absorbed into the bloodstream across the epithelial cells lining the walls of the small intestines.