{HEAD ~ Evacuation} and {TAIL ~ collapse} of the fluid bladders 24, 26, or some other resilient feature of the end effector 14, causes the anvil 12 to open 
{ HEAD ~ Evacuation } and { TAIL ~ collapse } of the fluid bladders 24 , 26 , or some other resilient feature of the end effector 14 , causes the anvil 12 to open
HEAD HEAD HEAD HEAD HEAD OTH 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 OTH OTH OTH OTH