Fig. 11From: Comparative morphology and development of extra-ocular muscles in the lamprey and gnathostomes reveal the ancestral state and developmental patterns of the vertebrate headSchematic illustration of the comparison of the EOMs development. a–c lamprey. d–f: shark. a, d Pharyngeal stages. b, e Three head mesodermal portions innervated by respective motor nerves. c, f Differentiated stateBack to article page