primordium

pancreas primordium Gland rhombic lip Bone gallbladder primordium Organ stomach primordium Organ insect imaginal disc primordium Organ insect tracheal primordium Organ insect Bolwig organ primordium Organ ectodermal placode Organ clavicle bone primordium Bone angioblastic cord Organ insect embryonic optic lobe primordium Organ insect abdominal histoblast primordium Organ thyroid diverticulum Gland primordial vasculature Organ salivary gland primordium Gland squamous part of temporal bone primordium Bone tetrapod parietal bone primordium Bone temporomandibular joint primordium Joint insect circulatory system primordium Organ pancreas ventral primordium Gland insect visual primordium Organ insect dorsal epidermis primordium Organ insect ventral epidermis primordium Organ insect clypeo-labral primordium Organ anterior crista primordium Organ insect adult clypeo-labral primordium Organ tetrapod frontal bone primordium Bone pancreas dorsal primordium Gland knee joint primordium Joint ethmoid bone primordium Bone Hatschek's diverticulum Organ interparietal bone primordium Bone elbow joint primordium Joint hip joint primordium Joint