Headward, the alimentary tube extends up in front of the notochord and tasks earlier mentioned the higher Element of the body wall (tongue) and before and beneath the brain to affix the epidermal depression. Within the epidermal despair are shaped the enamel and the majority of the mouth lining; from https://elliottqpyuo.blogsumer.com/33199199/the-5-second-trick-for-origins-history