Instrument docking ports and gas valve docking ports for sealingly engaging surgical access ports for use in transendoscopic and laparoscopic surgical procedures. The instrument docking ports comprise a cannula that defines a passageway for a surgical instrument, a rim outwardly extending around the circumference of the receiving end of the cannula that cooperates with one or more retaining protrusions outwardly extending about the external surface of the cannula to maintain the position of the cannula when installed for use. Disposed within the cannula is at least one sealing disc to allow insertion of a surgical instrument therethrough. The sealing disc sealingly engages with the surgical instrument when inserted and returns to a closed position when the surgical instrument is removed. The gas valve docking port has a gas ingress port and a gas egress port for controllable insufflation and desufflation of a target body cavity during a surgical procedure.
