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