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DERIVATIVES OF THE PRIMITIVE PHARYNX
INTEGUMENT AND ASSOCIATED STRUCTURES DEVELOPMENT
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abdominal alar lamina amnion appears artery aspect attached basal basal lamina becomes begins body body-stalk body-wall bursa capsule cartilage cartilaginous caudal cavity cells chorion cloaca coelomic connection continuous cord cranial decidua diagram dorsal wall ectoderm elongated embryo enlargement epithelial extends fibres floor fold fore-brain fore-gut formation formed forward front fused gland groove growing growth hind-brain hind-gut inner invagination lamina lateral layer limb liver lower margin mass median membrane mesentery mesoderm mid-brain muscles nasal nerve neural neuroblasts notochord nuclei opening original outer outgrowths ovum paraxial pericardium pharyngeal pharyngeal arches plate posterior pouch Price primitive projecting region remnant ridge roof round rudiments second month seen segmental separated septum transversum shown in Fig shows side sinus somites stage structures surface telencephalon thickening third arch third month tissue tube tubules umbilical upper uterus vein venous ventral vessels villi visceral vitelline vitelline vein Wolffian body Wolffian duct yolk-sac