The Spinal Cord Substantia alba Radix posterior 2. External features外形 entralis anterior Radix ante x A long cylindrical structure 218.脊髓和脊神经根 Spinal cord and roots of spinal nerves slightly flattened anteroposteriorly 呈前后稍扁的圆柱形 许圆锥 次 conus medullaris脊髓圆锥 k filum terminale终丝2. External features 外形 ＊ A long cylindrical structure slightly flattened anteroposteriorly 呈前后稍扁的圆柱形。 ＊ conus medullaris 脊髓圆锥 ＊ filum terminale 终丝 The Spinal Cord