A scope system, comprising: an elongate tube comprising a lumen extending therethrough, the elongate tube further comprising a distal portion, the distal portion comprising a plurality of circumferentially uncontinuous ribs, each of the plurality of circumferentially uncontinuous ribs generally 90-degree rotation-reflection symmetrical about the proximal-distal longitudinal axis, each of the plurality of circumferentially uncontinuous ribs comprising a rib opening, the rib openings of the plurality of circumferentially uncontinuous ribs being coaxial; at least one accessory channel (16, 18) comprising a tubular structure comprising an accessory lumen extending therethrough, each of the plurality of circumferentially uncontinuous ribs surrounding the at least one accessory channel, the at least one accessory channel movably disposed at least partially within the lumen, the at least one accessory channel comprising a distal end section; a first control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; a second control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; a third control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; and a fourth control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; wherein proximal movement of the first control wire bends the distal portion in a first direction; wherein proximal movement of the second control wire bends the distal portion in a second direction, the second direction opposite to the first direction; wherein proximal movement of the third control wire bends the distal portion in a third direction, the third direction perpendicular to the first direction and perpendicular to the second direction; wherein proximal movement of the fourth control wire bends the distal portion in a fourth direction, the fourth direction opposite to the third direction; wherein the first control wire, the second control wire, the third control wire, and the fourth control wire connect the plurality of circumferentially uncontinuous ribs; and wherein the at least one accessory channel is reversibly removable from an interior cavity of each of the plurality of circumferentially uncontinuous ribs through the rib openings. an elongate tube comprising a lumen extending therethrough, the elongate tube further comprising a distal portion, the distal portion comprising a plurality of circumferentially uncontinuous ribs, each of the plurality of circumferentially uncontinuous ribs generally 90-degree rotation-reflection symmetrical about the proximal-distal longitudinal axis, each of the plurality of circumferentially uncontinuous ribs comprising a rib opening, the rib openings of the plurality of circumferentially uncontinuous ribs being coaxial; at least one accessory channel (16, 18) comprising a tubular structure comprising an accessory lumen extending therethrough, each of the plurality of circumferentially uncontinuous ribs surrounding the at least one accessory channel, the at least one accessory channel movably disposed at least partially within the lumen, the at least one accessory channel comprising a distal end section; a first control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; a second control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; a third control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; and a fourth control wire, connected to the distal portion of the elongate tube and extending proximally along the elongate tube; wherein proximal movement of the first control wire bends the distal portion in a first direction; wherein proximal movement of the second control wire bends the distal portion in a second direction, the second direction opposite to the first direction; wherein proximal movement of the third control wire bends the distal portion in a third direction, the third direction perpendicular to the first direction and perpendicular to the second direction; wherein proximal movement of the fourth control wire bends the distal portion in a fourth direction, the fourth direction opposite to the third direction; wherein the first control wire, the second control wire, the third control wire, and the fourth control wire connect the plurality of circumferentially uncontinuous ribs; and wherein the at least one accessory channel is reversibly removable from an interior cavity of each of the plurality of circumferentially uncontinuous ribs through the rib openings.