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A. Axial schematic figure of lumbar vertebra: 1, aorta; 2, segmental artery; 3, direct vertebral body feeding artery; 4, intercostal/muscular artery; 5, dorsal spinal artery; 6, radicular artery; 7, nutrient artery. B. Sagittal schematic figure of lumbar vertebra: 1, segmental artery; 2, metaphyseal anastomosis; 3, intermetaphyseal anastomosis.
