18. In vertebrates, all the digestive are
formed by:
O Mesoderm only
O
Ectoderm only
O Endoderm only
O None of these
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The digestive system of modern reptiles is similar in general plan to that of all higher vertebrates. It includes the mouth and its salivary glands, the esophagus, the stomach, and the intestine and ends in a cloaca.
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