The first and second arms each have {HEAD ~ a lobe section} between {TAIL ~ their distal and proximal ends}, which are resiliently deformable to allow movement of the distal ends relative to the proximal ends of the respective arms 
between
The first and second arms each have { HEAD ~ a lobe section } between { TAIL ~ their distal and proximal ends } , which are resiliently deformable to allow movement of the distal ends relative to the proximal ends of the respective arms
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH