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a: low power view of primordial otic capsule at 8w gestation.
C: cochlea. ED: endolymphatic duct. S: saccule.
b: high power view of otic capsule at 8w (same section as a) in the region of the endolymphatic duct. The vascular primordial vestibular arch (connective tissue layer of endolymphatic duct) is outlined by a white dashed line.
CSC: cochlear side cartilage. ED: endolymphatic duct. VSC: vestibular side cartilage.
