{HEAD ~ The surgical port} generally comprises a hollow, thin walled flexible tubular body provided with a thin walled flexible annular flange at one end of {TAIL ~ the tubular body} 
{ HEAD ~ The surgical port } generally comprises a hollow , thin walled flexible tubular body provided with a thin walled flexible annular flange at one end of { TAIL ~ the tubular body }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL