An endoscopically implantable inflatable interbody fusion device, including an inflatable body having a first inner wall and an outer wall, a first cavity defined by the first inner wall, at least one hollow space between the first inner wall and the outer wall, a first delivery tube extending from outside the outer wall into the at least one hollow space, and a second delivery tube extending from outside the outer wall, through the at least one hollow space, and terminating in the first cavity.