Fig. 7

Detailed description of an embryo at 11 dpf representative of the O4 period. a Whole embryo. Black lines represent the location of transverse sections shown in b–f. b–g Transverse sections. b–d Sections of the head. e Section of the heart the arrowhead shows an erythrocyte. f Section of the trunk. g Detail of the section f showing the vacuolated notochord and the difference of epithelium thickness between the ventral and the dorsal sides of the swim bladder. At atrium, Avv atrioventricular valve, Ba bulbus arteriosus, Cb and stars ceratobranchial arch, E eyes, En Encephalon, Ep epithelial projection, Etp ethmoïd plate, Ff finfold, H heart, Hyo hyosymplectic, Ie inner ear, Int intestine, Ld lipid droplet, Li liver, Myo myotome, Nt notochord, Ole olfactory epithelium, O operculum, Olp olfactory pit, Ot otoliths, Ote optic tectum, Pa pancreas, Par parachordal, Pf pectoral fins, Rsc rostral semicircular canal, Sb Swim bladder, Tel telencephalon, V ventricle, Y yolk. Scale bar 500 µm for a and 50 µm for b–g