Headward, the alimentary tube extends up before the notochord and projects previously mentioned the upper Element of the body wall (tongue) and in front of and beneath the Mind to hitch the epidermal melancholy. From the epidermal depression are formed the teeth and the vast majority of mouth lining; from https://accident-liability-suppor45555.ja-blog.com/34086317/new-step-by-step-map-for-body-structure-size