A seal assembly adapted for use in conjunction with a trocar assembly includes a plurality of seal segment, each seal segment including a. pecpheral edge and a seam edge Each seal segment furrber incduder a first section end a second section with a vertical wall connecting the first section and the second section in such a way that the first section is displaced relative to the second section such that the fiist section of a first seal segment may be placed upon the second section of a second seal segment with the first sectons of the first and second seal segments lying in the same plane and the second sections of the first and second seal segments lying in the same plane, The seal segments are assembled in an overlapping woven arrangement to provide a complete seal body without the need for a secondaty seal
