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Carnegie Stage Section
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artifact space(s), cerebral aqueduct (mesocoele), cerebral peduncle, diverticulum of rhombencoel (fourth ventricle), floor plate, head mesenchyme, interpeduncular fossa, rhombencoel (fourth ventricle), roof plate, subarachnoid space, sulcus limitans, surface ectoderm, trochlear nerve (CN IV)
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Carnegie Embryo #4090   |   Location: 4-3

Keywords: artifact space(s), cerebral aqueduct (mesocoele), cerebral peduncle, diverticulum of rhombencoel (fourth ventricle), floor plate, head mesenchyme, interpeduncular fossa, rhombencoel (fourth ventricle), roof plate, subarachnoid space, sulcus limitans, surface ectoderm, trochlear nerve (CN IV)

Source: The Virtual Human Embryo.